Publications

L. Ramdas Ram-Mohan

January 5, 2014

Summary: Total of 200 papers: (including 17 invited papers, 3 book chapters, 4 review articles, and 16 Conference papers of which 5 are invited talks). Also listed are: 2 patents and 1 book with reviewers' comments, and 10 commercial quality software items developed for scientific research.

SUMMARY

I	Publications in Archival Journals	174
II	Publications in Refereed Conference Proceedings	16
	Total Publications	190

III	Patents	2
IV	Book
II	Software developed at Quantum Semiconductor Algorithims, Inc.	10

Publications in Archival Journals

Citations: The publications listed here have a total of 6941 citations in the literature as of May, 2014.

Number of citations of each paper is listed in braces below, with data from Web of Science, Google Scholar, or from SPIRES-SLAC databases

{15} “Nonleptonic and weak-electromagnetic decays of the hyperons in the pole model,” L. R. Ram-Mohan, Physical Review 179, 1561-1566 (1969).
{20} “Nonleptonic decays of the Ω- in the current-current model,” L. R. Ram-Mohan, Physical Review D 1, 266-273 (1970).
{2} “SU(3) symmetry and algebraic realizations of chiral symmetry,” L. R. Ram-Mohan, Physical Review D 2, 299-304 (1970).
{3} “The baryon pole model for s-wave hyperon decay,” L. R. Ram-Mohan, Physical Review D 2, 2101-2102 (1970).
{11} “Current algebra and the weak radiative decays of hyperons,” L. R. Ram-Mohan, Physical Review D 3, 785-786 (1971).
{2} “Photon low energy theorem and the radiative decays of the Ω- particle,” L. R. Ram-Mohan, Physical Review D 3, 2148-2152 (1971). Ph.D. Thesis: ”The weak decays of the Ω- particle and current algebra,” Department of Physics, Purdue University, Indiana, USA, October 1970. Thesis Advisor, Professor S. P. Rosen.
{7} “Superconvergence and algebraic realizations of chiral symmetry,” A. McDonald and L. R. Ram-Mohan, Physical Review D 3, 3076-3078 (1971).
“Sum rules for CP nonconserving BBπ amplitudes in Glashow's model,” L. R. Ram-Mohan, Physical Review D 4, 825-830 (1971).
{2} “Behavior of space components of currents under SU(3) x SU(3) transformations,” J. Katz and L. R. Ram-Mohan, Physical Review D 4, 415-425 (1971).
{1} “Scale and conformal transformations of currents and tensor meson dominance,” H. Genz, J. Katz, and L. R. Ram-Mohan, Physical Review D 6, 624-631 (1972).
{7} “Chiral symmetry breaking and the Cabibbo angle,” H. Genz, J. Katz, L. R. Ram-Mohan, and S. Tatur, Physical Review D 6, 3259-3265 (1972).
{16} “Predictions of the couplings of f and ρ trajectories from chiral symmetry,” H. Kleinert and L. R. Ram-Mohan, Nuclear Physics B 52, 253-279 (1973).
{2} “Algebra of Regge residues and chiral symmetry,” L. R. Ram-Mohan, Nuclear Physics B 72, 201-220 (1974).
{3} “Role of the pomeron in tensor meson dominance,” L. R. Ram-Mohan and K. V. Vasavada, Physical Review D 9, 2627-2630 (1974).
{1} "Life-time of elementary particles from analytic continuation in momentum and infinite component wave equations,'' L. R. Ram-Mohan and K. C. Tripathy, Physical Review D 10, 2255-2259 (1974).
{4} “Nucleon representation of the algebra of Regge residues and chiral symmetry,” L. R. Ram-Mohan, Physical Review D 12, 2886-2893 (1975).
{57} “Renormalization of the sigma model at finite temperature,” L. R. Ram-Mohan, Physical Review D 14, 2670-2686 (1976).
{5} “Spectral function sum-rules and the pion electromagnetic mass difference at finite temperature,” L. R. Ram-Mohan, Physical Review D 15, 3030-3036 (1977).
{11} “Elementary particle symmetries in relativistic many-body theory at finite temperature and density,” R. W. Minich and L. R. Ram-Mohan, Physical Review D 19, 1582-1600 (1979).
{11} “Direct generation of ultrasound by electromagnetic radiation in metals: effect of surface scattering,” L. R. Ram-Mohan, E. Kartheuser, and S. Rodriguez, Physical Review B 20, 3233-3244 (1979).
{1} “Density isomerism and the Primakoff effect,” R. W. Minich and L. R. Ram-Mohan, Physics Letters 93B, 467-471 (1980).
{20} “Direct generation of ultrasound by electromagnetic radiation in metals in a magnetic field,” G. Feyder, E. Kartheuser, L. R. Ram-Mohan, and S. Rodriguez, Physical Review B 25, 7141-7156 (1982).
{4} “The joint density of states in interband transitions in semiconductors in a magnetic field,” L. R. Ram-Mohan and P. A. Wolff, Physical Review B 26, 67ll-6717 (1982).
Invited Paper: “Plasmon-Assisted Recombination in Narrow-Gap Semiconductors in a Magnetic Field,” Peter A. Wolff, C. Verie, M. E. Weiler, S. Y. Yuen, and L. R. Ram-Mohan; Proc. 4th Int. Conf. on Small Gap Semiconductors, Linz, Austria, September 1981, Springer Lecture Notes in Physics Vol 152, pp. 135-146, ed. E. Gornick, H. Henrich, and L. Palmetshofer (Springer, Berlin, 1982).
{5} “Effects of the Bragg and deformation potential forces on ultrasound propagation in metals''; G. Feyder, E. Kartheuser, L. R. Ram-Mohan, and S. Rodriguez, Physical Review B 27, 3213-3220 (1983).
{9} “Direct generation of ultrasound by electromagnetic radiation in metals in a magnetic field: An Integral Equation Approach,” G. Feyder, E. Kartheuser, L. R. Ram-Mohan, and S. Rodriguez, Physical Review B 27, 7107-7116 (1983).
{6} “Effect of elastic anisotropy on the electromagnetic generation of ultrasound in potassium,” S. Gopalan, G. Feyder, S. Rodriguez, E. Kartheuser, and L. R. Ram-Mohan, Physical Review B 28, 7323-7326 (1983).
{4} “Hole induced four wave mixing and intervalence band relaxation times in p-GaAs and p-Ge,” S. Y. Yuen, P. A. Wolff, L. R. Ram-Mohan, and R. A. Logan, Solid State Communications 56, 489-491 (1985).
{9} Review Article: “Theory of Electromagnetic Generation of Acoustic Waves in Metals,” E. Kartheuser, L. R. Ram-Mohan, and S. Rodriguez, Advances in Physics 35, pp423-505 (1986).
Invited Paper: “Recent High field Work on Diluted Magnetic Semiconductors,” P. A. Wolff, D. Heiman, E. D. Issacs, P. Becla, S. Foner, L. R. Ram-Mohan, D. Ridgely, K. Dwight and A. Wold, Proc. Int. Conf. on the "Applications of High Magnetic Fields in Semiconductor Physics", Wurzburg, W. Germany, Aug 18-22, 1986.
{39} “Piezomodulated electronic spectra of semiconductor heterostructures: GaAs/AlGaAs quantum well structures,” Y. R. Lee, A. K. Ramdas, F. A. Chambers, J. M. Meese, and L. R. Ram-Mohan, Applied Physics Letters 50, 600-602 (1987).
{1} Invited Paper: “What limits Magnetic Polaron Energies in Diluted Magnetic Semiconductors?,” P. A. Wolff and L. R. Ram-Mohan, in "Diluted Magnetic (Semimagnetic) Semiconductors''; Materials Research Society Symposium Proceedings, ed. R. L. Aggarwal, J. K. Furdyna and S. von Molnar (Materials Research Society, Pittsburgh, 1987) Vol 89, p1-5 (1987).
{13} “Theoretical and experimental investigation of the effective g-factor of donor-bound electrons in InSb,” Z. Barticevic, J. Furdyna, M. Dobrowolska, L. R. Ram-Mohan, and S. Rodriguez, Physical Review B 35, 7464-7473 (1987).
“Large Donor-bound Magnetic Polarons below T=1K,” E. D. Issacs, D. Heiman, and L. R. Ram-Mohan, Int. Conf. Physics of Semimagnetic Semiconductors, Jablonna, Poland (1987).
{7} “Piezomodulated Electronic Spectra of Heterostructures of Semiconductors: GaAs/AlGaAs Quantum Well Structures,” Y. R. Lee, A. K. Ramdas, F. A. Chambers, J. M. Meese, and L. R. Ram-Mohan, Proc. SPIE-Int. Soc. Opt. Eng. Vol 794, 105-110 (1987).
{3}“Optical studies of Cd0.9Mn0.1Te doped With Au, As, Cu and P acceptors,” J. Misiewicz, P. Becla, E. D. Issacs, P.A. Wolff, D. Heiman, L. R. Ram-Mohan, and J. M. Wrobel, Journal of Applied Physics 63, 2396-2401 (1988).
{25}“The energetics of acceptor-bound magnetic polarons in diluted magnetic semiconductors,” L. R. Ram-Mohan, and P. A. Wolff, Physical Review B 38, 1330-1339 (1988).
{161} “A transfer matrix algorithm for the calculation of band structure of semiconductor superlattices,” L. R. Ram-Mohan, K. H. Yoo, and R. L. Aggarwal, Physical Review B 38, 6151-6159 (1988).
{40} “Accepter bound magnetic polarons in Cd1-xMnxTe,” M. Bugajski, P. Becla, P. A. Wolff, D. Heiman, and L. R. Ram-Mohan, Physical Review B 38, 10512-10516 (1988).
{20}“HgTe/CdTe superlattice band calculation with a transfer matrix algorithm,” K. H. Yoo, R. L. Aggarwal, and L. R. Ram-Mohan, Journal of Vacuum Science and Technology A 7, 415-419 (1989).
{42}“Effect of band nonparabolicity in GaAs/GaxAl1-xAs semiconductor quantum wells,” K. H. Yoo, L. R. Ram-Mohan, and D. F. Nelson, Physical Review B 39, 12808-12813 (1989).
{17} “Double hole cyclotron resonance in zero-gap HgTe-CdTe superlattices,” J. R. Meyer, R. J. Wagner, F. J. Bartoli, C. A. Hoffman, and L. R. Ram-Mohan, Physical Review B 40, Rapid Communications, 1388-1391 (1989).
{26}“Finite element calculation of low lying states of hydrogen in a superstrong magnetic field,” J. Shertzer, L. R. Ram-Mohan, and D. Dossa, Physical Review A 40, 4777-4780 (1989).
{40}“The finite element method for energy eigenvalues of quantum mechanical systems,” L. R. Ram-Mohan, S. Saigal, D. Dossa, and J. Shertzer, Computers in Physics 4, 50-59 (1990).
{1} “Far infrared magneto-optical study of holes and electrons in zero-gap HgTe/Cd0.85Hg0.15Te superlattices,” M. Dobrowolska, T. Wojtowicz, H. Luo, J. K. Furdyna, O. K. Wu, J. R. Meyer, C. A. Hoffman, F. J. Bartoli and L. R. Ram-Mohan, Semiconductor Science and Technology 5, s103-s106 (1990).
{12} “Room temperature magnetoabsorption in HgTe/Hg0.15Cd0.85Te superlattices,” K. H. Yoo, R. L. Aggarwal, L. R. Ram-Mohan, and O. K. Wu, Journal of Vacuum Science and Technology A 8, 1194-1199 (1990).
{39} “Electron transport and cyclotron resonance in [211]-oriented HgTe-CdTe superlattices,” C. A. Hoffman, J. R. Meyer, R. J. Wagner, F. J. Bartoli, X. Chu, J. P. Faurie, L. R. Ram-Mohan, and H. Xie, Journal of Vacuum Science and Technology A 8, 1200-1205 (1990).
{14} “Band edge properties of quasi-1D HgTe-CdTe heterostructures,” J. R. Meyer, F. J. Bartoli, C. A. Hoffman, and L. R. Ram-Mohan, Physical Review Letters 64, 1963-1966 (1990).
{16} “Piezomodulated reflectivity spectra of GaAs/AlxGa1-xAs single parabolic quantum well heterostructures,” Y. R. Lee, A. K. Ramdas, A. L. Moretti, F. A. Chambers, G. P. Devane, and L. R. Ram-Mohan, Physical Review B 41, 8380-8387 (1990).
{22} “Removal of accidental degeneracies in quantum wires',” J. Shertzer and L. R. Ram-Mohan, Physical Review B 41, 9994-9999 (1990).
{7} “Electronic energy bands and optical nonlinearity of checker-board superlattices,” L. R. Ram-Mohan and J. Shertzer, Applied Physics Letters 57, 282-284 (1990).
{3} “Stimulated emission of Longitudinal Optic Phonons in Narrow Gap Pb1-xSnxTe,” R. B. Sohn, L. R. Ram-Mohan, H. Xie, and P. A. Wolff, Physical Review B 42, 3608-3619 (1990).
{52} “Electron hole recombination in narrow gap Hg1-xCdxTe and stimulated emission of longitudinal optic phonons,” H. Xie, L. R. Ram-Mohan, and P. A. Wolff, Physical Review B 42, 3620-3627 (1990).
{11} “Nonlinear optical properties of GaAs/Ga1-xAlxAs superlattices,” H. Xie, L. Friedman, and L. R. Ram-Mohan, Physical Review B 42, 7124-7131 (1990).
{19} “Magneto-optical properties of HgTe-CdTe superlattices,” J. R. Meyer, R. J. Wagner, F. J. Bartoli, C. A. Hoffman, T. Wojtowicz, M. Dobrowolska, J. Furdyna, and L. R. Ram-Mohan, Physical Review B 42, 9050-9062 (1990).
{6} “Higher-order electron cyclotron resonance in n-type HgTe-CdTe superlattices,” M. Dobrowolska, T. Wojtowicz, J. K. Furdyna, J. R. Meyer, R. D. Feldman, R. F. Austin, and L. R. Ram-Mohan, Applied Physics Letters 57, 1781-1783 (1990).
“Optical nonlinearities of GaAs/Ga1-xAlxAs superlattices,” H. Xie, L. Friedman, and L. R. Ram-Mohan, Proc. SPIE-Int. Soc. Opt. Eng. Vol 1283, 360-371 (1990).
{4} “Magneto-optical transitions between subbands with different quantum numbers in narrow gap HgTe-CdTe superlattices,” H. Luo, G. L. Yang, J. K. Furdyna, and L. R. Ram-Mohan, Journal of Vacuum Science and Technology B 9, 1809-1812 (1991).
{6} “Theory for electron and hole transport in HgTe-CdTe superlattices,” J. R. Meyer, D. J. Arnold, C. A. Hoffman, F. J. Bartoli, and L. R. Ram-Mohan, Journal of Vacuum Science and Technology B 9, 1818-1822 (1991).
{6} “Laterally confined HgTe-CdTe quantum wells and superlattices,” J. R. Meyer, F. J. Bartoli, C. A. Hoffmann, and L. R. Ram-Mohan, Superlattices and Microstructures 7, 387-391 (1991).
{6} “Magnetic activation of bipolar plasmas in HgTe-CdTe superlattices,” J. R. Meyer, C. A. Hoffman, F. J. Bartoli, T. Wojtowicz, M. Dobrowolska, J. Furdyna, X. Chu, J. P. Faurie, and L. R. Ram-Mohan, Physical Review B 44, Rapid Communications, 3455-3458 (1991).
“Laterally confined HgTe-CdTe quantum wells and superlattices,” J. R. Meyer, F. J. Bartoli, C. A. Hoffman and L. R. Ram-Mohan, Proc. 5th Int. Conf. on Physics of Electro-Optic Materials, 1990, Crete, Greece, (1991).
Invited Paper: “Far Infrared magneto-spectroscopy of HgTe-CdTe superlattices in the semimetallic regime,” T. Wojtowicz, M. Dobrowolska, J. Furdyna, J. R. Meyer, C. A. Hoffman, F. J. Bartoli, and L. R. Ram-Mohan, Acta Physica Polonica A80, 245-254 (1991).
{8} “Raman and photoluminescence spectra of Zn1-yCdySe/Zn1-xMnxSe: a diluted magnetic semiconductor superlattice,” R. G. Alonso, E. Oh, A. K. Ramdas, H. Luo, N. Samarth, J. K. Furdyna, and L. R. Ram-Mohan, Physical Review B 44, 8009-8016 (1991).
{14} “Observation of above-barrier quasi-bound states in asymmetric single quantum wells by piezomodulated reflectivity,” D. Dossa, Lok C. Lew Yan Voon, L. R. Ram-Mohan, C. Parks, R. G. Alonso, A. K. Ramdas, and M. R. Melloch, Applied Physics Letters 59, 2706-2708 (1991).
“The bound magnetic polaron in CdMnTe under pressure,” M. Prakash, M. Chandrasekhar, H. R. Chandrasekhar, L. Miotkowski, A. K. Ramdas, and L. R. Ram-Mohan, Proc. 20th Int. Conf. on the Physics of Semiconductors, ed. E. M. Anastassakis and J. D. Joannopoulos (World Scientific, Singapore, 1990), Vol. 1, p747-750 (1991).
“Magneto-optical resonances in HgTe-CdTe superlattices,” J. R. Meyer, F. J. Bartoli, C. A. Hoffman, M. Dobrowolska, T. Wojtowicz, J. K. Furdyna, and L. R. Ram-Mohan, Proc. 20th Int. Conf. on the Physics of Semiconductors; ed. E. M. Anastassakis and J. D. Joannopoulos (World Scientific, Singapore, 1990), p1170-1173 (1991).
“Pressure tuning of magnetic interactions in CdMnTe,” M. Prakash, M. Chandrasekhar, H. R. Chandrasekhar, L. Miotkowski, A. K. Ramdas, and L. R. Ram-Mohan, Proc. 4th Int. Conf. on High Pressure in Semiconductor Physics, 1990, ed. D. S. Kyriakos and O. E. Valassiades, Porto Carras, Greece, p258-261 (1991).
{16} “Modulated reflectivity spectrum of ZnSe/Zn1-xCdxSe/ZnSe strained single quantum wells,” R. G. Alonso, C. Parks, A. K. Ramdas, H. Luo, N. Samarth, J. K. Furdyna, and L. R. Ram-Mohan, Physical Review B 45, 1181-1186 (1992).
{32} “The diagonal representation for the transfer matrix method for obtaining electronic energy levels in layered semiconductor heterostructures,” B. Chen, M. Lazzouni, and L. R. Ram-Mohan, Physical Review B 45, 1204-1212 (1992).
{20} “Piezomodulated reflectivity of Alx1Ga1-x1As/GaAs/Alx2Ga1-x2As asymmetric and symmetric single quantum wells,” C. Parks, R. G. Alonso, A. K. Ramdas, L. R. Ram-Mohan, D. Dossa, and M. R. Melloch, Physical Review B 45, 14215-14224 (1992).
{43} “Observation of localized above-barrier excitons in type-I superlattices,” F. C. Zhang, N. Dai, H. Luo, N. Samarth, M. Dobrowolska, J. K. Furdyna, and L. R. Ram-Mohan, Physical Review Letters 68, 3220-3223 (1992).
{2} “Magnetic generation of electrons and holes in semimetallic HgTe-CdTe Superlattices,” J. R. Meyer, C. A. Hoffman, F. J. Bartoli, T. Wojtowicz, M. Dobrowolska, J. Furdyna, X. Chu, J. P. Faurie, and L. R. Ram-Mohan, Journal of Vacuum Science and Technology B 10, 1582-1586 (1992).
{15} “Electron and hole in-plane mobilities in HgTe-CdTe Superlattices,” J. R. Meyer, D. J. Arnold, C. A. Hoffmann, F. J. Bartoli, and L. R. Ram-Mohan, Physical Review B 46, 4139-4146 (1992).
{9} “HgTe-CdTe superlattices for IR detection revisited,” T. H. Myers, J. R. Meyer, C. A. Hoffman, and L. R. Ram-Mohan, Applied Physics Letters 61, 1814-1816 (1992).
{18} “Barrier localization effects in the AlxGa1-xAs-AlyGa1-yAs superlattices,” Lok C. Lew Yan Voon, L. R. Ram-Mohan, H. Luo, and J. K. Furdyna, Physical Review B 47, 6585-6589 (1993).
{3} “States confined in the barriers of type-III HgTe-CdTe superlattices,” H. Luo, L. R. Ram-Mohan, G. L. Yang, Y. Xuan, and J. K. Furdyna, Journal of Electronic Materials 22, 1103-1106 (1993).
{65} “Tight binding representation of the optical matrix elements: theory and applications,” L. C. Lew Yan Voon and L. R. Ram-Mohan, Physical Review B 47, 15500-15508 (1993).
{19} “Piezomodulated reflectivity study of minibands in AlxGa1-xAs/GaAs superlattices,” C. Parks, A. K. Ramdas, L. R. Ram-Mohan, and M. R. Melloch, Physical Review B 48, 5413-5421 (1993).
{2} “Band-to-band lasing in type-II GaAs-AlAs short-period superlattices,” Lok C. Lew Yan Voon and L. R. Ram-Mohan, Superlattices and Microstructures 14, 49-52 (1993).
{3} “Semimetallic InAs/Ga1-xInxSb Superlattices with HgTe/CdTe-like band structures,” J. R. Meyer, C. A. Hoffman, F. J. Bartoli, and L. R. Ram-Mohan, Physical Review B 49, 2197-2200 (1994).
{12}“Electron Transport in InAs/Ga1-xInxSb superlattices,” C. A. Hoffman, J. R. Meyer, E. R. Youngdale, F. J. Bartoli, R. H. Miles, and L. R. Ram-Mohan, Solid State Electronics 37, 1203-1206 (1994).
{2} “Observation of electronic states confined in surface quantum wells and above quantum barriers in modulated reflectivity,” C. Parks, A. K. Ramdas, M. R. Melloch, G. Steblovsky, L. R. Ram-Mohan, and H. Luo, Solid State Communications 92, 563-567 (1994).
{22} “Normal incidence second-harmonic generation in L-valley AlSb/GaSb/Ga1-xAlxSb/AlSb stepped quantum wells,” H. Xie, W. I Wang, J. R. Meyer, and L. R. Ram-Mohan, Applied Physics Letters 65, 2048-2050 (1994).
{1} Comment on above paper: “Normal incidence second-harmonic generation in L-valley AlSb/GaSb/Ga1-xAlxSb/AlSb stepped quantum wells,” by M. Zaluzny and V. Bondarenko, Applied Physics Letters 68, 1872 (1996). Our reply: L. R. Ram-Mohan, J. R. Meyer, H. Xie, and W. I. Wang, Applied Physics Letters 68, 1873 (1996).
“Hydrostatic pressure studies of optical transitions in the photoluminesence spectra of thick epilayers of Zn1-xCdxSe and Zn1-xCdxSe/ZnSe strained layer multiple quantum wells,” M. S. Boley, R. J. Thomas, Meera Chandrasekhar, H. R. Chandrasekhar, L. R. Ram-Mohan, N. Samarth, H. Luo, and J. K. Furdyna, AIP Conference Proceedings 309, ed. by S. C. Schmidt, J. W. Shaner, G. A. Samara and M. Ross, p 203-206, AIP Press, New York, (1994).
{7} “Calculations of second-order nonlinear optical susceptibilities in III-V and II-VI semiconductor heterostructures,” L. C. Lew Yan Voon and L. R. Ram-Mohan, Physical Review B 50, 14421-14434 (1994).
{2} “Quantum mechanical tunneling and finite elements,” R. Goloskie, J. W. Kramer, and L. R. Ram-Mohan, Computers in Physics 8, 679-686 (1994).
{40} “Observation of above-barrier transitions in superlattices with small magnetically induced band offsets,” N. Dai, L. R. Ram-Mohan, H. Luo, G. L. Yang, F. C. Zhang, M. Dobrowolska, and J. K. Furdyna, Physical Review B 50, 18153-18166 (1994).
{4} "Photoluminescence study of HgTe/CdTe superlattices,” J. R. Meyer, A. R. Reisinger, K. A. Harris, R. W. Yanka, L. M. Mohnkern, and L. R. Ram-Mohan, Journal of Crystal Growth 138, 981-987 (1994).
“Intersubband χ (2) in symmetric and asymmetric n- and p-doped GaAs and HgTe quantum wells,” L. C. Lew Yan Voon and L. R. Ram-Mohan, Proc. 7th Annual IEEE-LEOS Meeting, Boston, IEEE publications pp30-31 (1994).
“Momentum Space Reservoir for Saturation Suppression in Intersubband Frequency conversion devices,” J. R. Meyer, C. A. Hoffman. E. R. Youngdale, F. J. Bartoli, and L. R. Ram-Mohan, Proc. 7th Annual IEEE-LEOS Meeting, Boston, IEEE publications, p177 (1994).
{8} “Momentum-space reservoir for enhancement of intersubband second-harmonic generation,” J. R. Meyer, C. A. Hoffman, F. J. Bartoli, E. R. Youngdale, and L. R. Ram-Mohan, IEEE Journal of Quantum Electronics 31, 706-714 (1995).
{3} “A comparative study of ordered alloy and random alloy quantum wells of Zn1-xCdxSe/ZnSe under pressure,” E. M. Baugher, M. Chandrasekhar, H. Luo, J. K. Furdyna and L. R. Ram-Mohan, Journal of Physics and Chemistry of Solids 56, 323-328 (1995).
{2} “Modulated reflectivity spectroscopy of electronic states confined in surface quantum wells and above quantum barriers,” C. Parks, A. K. Ramdas, M. R. Melloch, G. Steblovsky, L. R. Ram-Mohan, and H. Luo, Journal of Vacuum Science and Technology B 13, 657-659 (1995).
{2} “Reflectance and photoreflectance for in-situ monitoring of the molecular beam epitaxial growth of CdTe and Hg-based materials,” Z. Yu, M. A. Mattson, T. H. Myers, K. A. Harris, R. W. Yanka, L. M. Mohnkern, L. C. Lew Yan Voon, L. R. Ram-Mohan, R. G. Benz, B. K. Wagner, C. J. Summers, Journal of Electronic Materials 24, 685-690 (1995).
{46} Invited Paper: “Multiband finite element modeling of wavefunction-engineered electro-optical devices,” L. R. Ram-Mohan and J. R. Meyer, Journal of Nonlinear Optical Physics & Materials 4, 191-243, special issue (1995).
{2} Invited Paper: “Normal incidence intersubband transitions for infrared electro-optical modulation and second harmonic generation,” H. Xie, W. I. Wang, J. R. Meyer, C. A. Hoffman, and L. R. Ram-Mohan, J. Nonlinear Optical Physics & Materials 4, 337-362, special issue (1995).
{26} “Can normal incidence absorption be realized with n-doped (001)-grown direct-gap quantum wells?” L. C. Lew Yan Voon, M. Willatzen, and L. R. Ram-Mohan, Journal of Applied Physics 78, 295-298 (1995).
{8} “Intersubband second-harmonic generation with voltage-controlled phase matching,” J. R. Meyer, C. A. Hoffman, F. J. Bartoli, and L. R. Ram-Mohan, Applied Physics Letters 67, 608-610 (1995).
{151} “Type-II quantum-well lasers for the mid-wavelength infrared,” J. R. Meyer, C. A. Hoffman, F. J. Bartoli, and L. R. Ram-Mohan, Applied Physics Letters 67, 757-759 (1995).
“Band structure, magneto-transport, and magneto-optical properties of InAs/Ga1-xInxSb superlattices,” J. R. Meyer, C. A. Hoffman, J. P. Omaggio, E. R. Youngdale, F. J. Bartoli, R. H. Miles, D. H. Chow, and L. R. Ram-Mohan, Journal of Electronic Materials 24, 551-557 (1995).
{9} “Infrared electro-optical modulators based on field induced Γ-L intervalley transfer,” J. R. Meyer, C. A. Hoffman, F. J. Bartoli, and L. R. Ram-Mohan, Applied Physics Letters 67, 2756-2758 (1995).
Invited Paper: “InAs/GaSb/AlSb quantum wells for infrared electro-optic applications,” C. A. Hoffman, J. R. Meyer, F. J. Bartoli and L. R. Ram-Mohan, Proc. 3rd Int. Symp. Long Wavelength Infrared Detectors and Arrays: Physics and Applications III, pp77-88 (1995).
Invited Paper: “Finite element and tight-binding calculations of nonlinear optical properties in wavefunction-engineered quantum heterostructures,” L. R. Ram-Mohan, Proc. 8th Annual IEEE-LEOS Meeting, San Francisco, IEEE publications, Vol. 2, p17-18 (1995).
“InAs-GaSb-AlSb quantum wells for infrared electro-optic applications,” C. A. Hoffman, J. R. Meyer, F. J. Bartoli, L. R. Ram-Mohan, Proceedings of the Third International Symposium on Long Wavelength Infrared Detectors and Arrays: Physics and Applications III, p 77-88, (1995).
“Four constituent type-II quantum well laser for wavelengths beyond 3 μm,” J. R. Meyer, C. A. Hoffman, F. J. Bartoli, L.R. Ram-Mohan, G. C. Dente, M. L. Tilton, and M. W. Prairie, Proc. 8th Annual IEEE-LEOS Meeting, San Francisco, IEEE publications, Vol 2, p163-164 (1995).
{1} “Electro-optical filters and modulators based on intersubband processes in InAs-GaSb-AlSb family double quantum wells,” J. R. Meyer, C. A. Hoffman, E. R. Youngdale, F. J. Bartoli, and L. R. Ram-Mohan, Proc. 7th Int. Conf. Physics of Narrow-Gap Semiconductors, Inst. of Phys. Conf. Series 144, p330-334 (IOP, Bristol, 1995).
{48} “Type-II and Type-I intersubband cascade lasers,” J. Meyer, I. Vurgaftman, R. Q. Yang, and L. R. Ram-Mohan, Electronics Letters 32, 45-46 (1996).
{1} Invited Paper: “Wavefunction engineering: a new paradigm in the design of quantum semiconductor devices,” L. R. Ram-Mohan and J. R. Meyer, Proceedings of the NASA Semiconductor Device Modeling Workshop, NASA Ames Research Center, ed. S. Saini, NASA Proceedings, p147 (1996).
{11} “Comment on `Multiband coupling effects on electron quantum well intersubband transitions' [J. Appl. Phys. 77, 747 (1995)],” L. C. Lew Yan Voon, M. Willatzen, M Cardona, and L. R. Ram-Mohan, Journal of Applied Physics 80, 600-602 (1996).
{3} “Boundary elements and surface plasmons,” R. Goloskie, T. Thio, and L. R. Ram-Mohan, Computers in Physics 10, 477-495 (1996).
{43} “Optimized second-harmonic generation in asymmetric double quantum wells,” I. Vurgaftman, J. R. Meyer, and L. R. Ram-Mohan, IEEE Journal of Quantum Electronics 32, 1334-1346 (1996).
{55} “Magneto-optical study of interwell coupling in double quantum wells using diluted magnetic semiconductors,” S. Lee, M. Dobrowolska, J. K. Furdyna, H. Luo and L. R. Ram-Mohan, Physical Review B 54, 16939-16951 (1996).
Invited Paper: “Wavefunction engineering of advanced quantum well laser, nonlinear optical, and electro-optical devices for the IR,” J. R. Meyer, I. Vurgaftman, J. I. Malin, C. A. Hoffman, and L. R. Ram-Mohan, Workshop on Optical Properties of Mesoscopic Structures, Snowbird, Utah (1996).
{1} Book Chapter: "Intersubband transitions for infrared electro-optics and nonlinear optics,” J. R. Meyer, C. A. Hoffman, F. J. Bartoli, L. R. Ram-Mohan, in Novel Optical Materials and Applications, ed. I. C. Khoo, F. Simone, and C. Umeton (Wiley, New York, 1996) Chapter 8.
“Detuned intersubband resonances for broadband field-modulated second-harmonic generation,” I. Vurgaftman, J. Meyer, and L.R. Ram-Mohan, Solid State Communications 100, 663-667 (1996).
“Phase matching in waveguide-mode intersubband χ(2)(2ω) devices,” I. Vurgaftman, J. R. Meyer, and L. R. Ram-Mohan, CLEO-QELS Proceedings Vol. 9, pp 274-275 (1996).
{43} “High-power/low-threshold Type-II interband cascade mid-IR laser -- design and modeling,” I. Vurgaftman J. R. Meyer, and L. R. Ram-Mohan, IEEE Photonics Technology Letters 9, 170-172 (1997).
{4} “Electronic and optical properties of (001) Si/ZnS heterostructures,” L. C. Lew Yan Voon, L. R. Ram-Mohan, and R. Soref, Applied Physics Letters 70, 1837-1839 (1997).
{8} “Bound magnetic polarons in p-type Cu2Mn0.9Zn0.1SnS4,” G. H. McCabe, T. Fries, M. T. Liu, Y. Shapira, L. R. Ram-Mohan, R. Kershaw, A. Wold, C. Fau, M. Averous and E. J. McNiff, Jr., Physical Review B 56, 6673-6680 (1997).
Invited Paper: “IR sources and modulators based on InAs/GaSb/AlSb-family quantum wells,” J. R. Meyer, C. L. Felix, J. I. Malin, I. Vurgaftman, C.-H. Lin, R. Q. Yang, and L. R. Ram-Mohan, Infrared Applications of Semiconductors - Materials, Processing and Devices; Proceedings of the Materials Research Society 450, 31-42 (1997).
Invited Paper: “High-temperature mid-IR type-II quantum well lasers,” J. R. Meyer, C. L. Felix, J. L. Malin, I. Vurgaftman, C. A. Hoffman, C. H. Lin, P. C. Chang, S. J. Murry, R. Q. Yang, S. S. Pei, and L. R. Ram-Mohan, Proc. SPIE-Int. Soc. Opt. Eng. Vol. 3001, 309-320 (1997).
Book Chapter: “Antimonide-based quantum heterostructure devices,” J. R. Meyer, J. I. Malin, I. Vurgaftman, C. A. Hoffman, and L. R. Ram-Mohan, in Antimonide-related Strained-Layer Heterostructures and their Applications, edited by M. O. Manasareh, (Gordon and Breach, Newark, NJ, 1997), Chapter 6, pp235-272.
“Modeling of type-II quantum well and interband cascade lasers,” I. Vurgaftman, J. R. Meyer, and L. R. Ram-Mohan, CLEO Proceedings, pp426-427 (1997).
{23} “Mid-IR vertical cavity surface-emitting lasers,” I. Vurgaftman, J. R. Meyer and L. R. Ram-Mohan, IEEE Journal of Quantum Electronics 34, 147-156 (1998).
{4} Feature article: “Semiconductor superlattices with small band offsets,” G. Yang, L. A. Lewandowski, L. R. Ram-Mohan, and J. K. Furdyna, Acta Physica Polonica A 93, p567-600 (1998).
Invited Paper: “Wavefunction Engineering: Optimizing Heterostructure Design,” L. R. Ram-Mohan and J. R. Meyer, in Integrated Photonics Research, Vol. 4, OSA Technical Digest Series (Optical Society of America, Washington, DC, 1998) pp.330-331.
{41} “Role of internal loss in limiting Type-II mid-IR laser performance,” W. W. Bewley, I. Vurgaftman, C. L. Felix, J. R. Meyer, C.-H. Lin, D. Zhang, S. J. Murry, S. S. Pei, and L. R. Ram-Mohan, Journal Applied Physics 83, 2384-2391 (1998).
“Mid-IR type-II diode lasers,” W. W. Bewley, I. Vurgaftman, C. L. Felix, E. H. Aifer, J. R. Meyer, C.-H. Lin, D. Zhang, S. J. Murry, S.-S. Pei, L. R. Ram-Mohan, Proc. SPIE-Int. Soc. Opt. Eng. “on in-plane semiconductor lasers: from ultraviolet to mid-infrared,” Vol. 3284, 294-305 (1998).
{6} Book Chapter: “Wavefunction engineering: a new paradigm in quantum nanostructure modeling,” L. R. Ram-Mohan, D. Dossa, I. Vurgaftman and J. R. Meyer, in Handbook of Nanostructured Materials and Nanotechnology, Vol. 2, Ed. H. S. Nalwa, (Academic Press, New York, 1999), Chap. 15.
{4} Invited Paper: “Progress towards Si-based inter-subband lasers,” R. A. Soref, L. Friedman, L. C. Lew Yan Voon, L. R. Ram-Mohan, and G. Sun, Journal of Vacuum Science and Technology B16, 1525-1528 (1998).
{46} “Design and Simulation of Low-Threshold Antimonide Intersubband Lasers,” I. Vurgaftman, J. R. Meyer, F. H. Julien, and L. R. Ram-Mohan, Applied Physics Letters 73, 711-713 (1998).
{16} “Wave-function mapping in multiple quantum wells using diluted magnetic semiconductors,” S. Lee, M. Dobrowolska, J. K. Furdyna, and L. R. Ram-Mohan, Physical Review B 59, 10302-10308 (1999).
“Optical transitions in semiconductor superlattices with small band offset in one band and large in the other,” G. Yang, E. Rzepniewski, J. K. Furdyna, L. R. Ram-Mohan, Semiconductor Science and Technology 14, 454-460 (1999).
{7} Invited Paper: “Wavefunction engineering of Antimonide Quantum Well Lasers,” L. R. Ram-Mohan, I. Vurgaftman, and J. R. Meyer, Microelectronics Journal, special issue on "Quasibound States in Semiconductor Quantum Devices,” Vol 30, 1031-1042 (1999).
{3} “High-Speed Spin-Polarized Intersubband Lasers,” I. Vurgaftman, J. R. Meyer and L. R. Ram-Mohan, Journal of Applied Physics 86, 4734-4739 (1999).
“Simulation of integrated silicon-based Ge/Si quantum well and superlattice infrared photo-detectors,” R. A. Soref, L. R. Friedman, M. J. Noble, D. Schwall, and L. R. Ram-Mohan, Proc. SPIE-Int. Soc. Opt. Eng. Vol. 3631A, 113-121 (1999).
{6} “Quantum well inter-subband THz lasers and detectors,” R. A. Soref, L. Friedman, G. Sun, M. J. Noble and L. R. Ram-Mohan, Proc. SPIE-Int. Soc. Opt. Eng. Vol. 3795, 516-527 (1999).
{1} “Waveguide Design Optimization for a Quantum Cascade Laser Emitting at 77 μm,” V. M. Menon, W. D. Goodhue, A. S. Karakashian, and L. R. Ram-Mohan, Physica E 7, 52-57 (2000).
{3} “Antimonide Interband and Intersubband Mid-IR and Terahertz Lasers,” I.Vurgaftman, J.R. Meyer and L. R. Ram-Mohan, Physica E 7, 76-79 (2000).
“TE- and TM-Polarized Optoelectronic Properties of HgCdTe Quantum Wells,” V. M. Menon, L. R. Ram-Mohan, I. Vurgaftman and J. R. Meyer, J. Electronic Materials 29, 865-868 (2000).
{15} “Phonon mediated lifetimes in intersubband terahertz lasers,” Vinod M. Menon, W. D. Goodhue, A.S. Karakashian, and L. R. Ram-Mohan, Journal of Applied Physics 88, 5262-5267 (2000).
{11} “Magnetic-field-induced substructures in multiple quantum wells consisting of magnetic and nonmagnetic semiconductor layers,” S. Lee, M. Dobrowolska, J. K. Furdyna, L. R. Ram-Mohan, Physical Review B 61, 2120-2127 (2000).
{757} Review Article: “Band Parameters for III-V Compound Semiconductors and Their Alloys,” I. Vurgaftman, J. R. Meyer and L. R. Ram-Mohan, Journal of Applied Physics 89, 5815-5875 (2001).
{20} “Finite Element Modeling of Enhanced Magnetoresistance in Thin Film Semiconductors with Metallic Inclusions,” J. Moussa, L. R. Ram-Mohan, J. Sullivan, T. Zhou, D. R. Hines, and S. A. Solin, Physical Review B 64, 184410-184418 (2001).
{1} “Enhancement of Zeeman splitting in double quantum wells containing ultrathin magnetic semiconductor layers,” S. Lee, M. Dobrowolska, J. K. Furdyna, L. R. Ram-Mohan, Physica E: Low-Dimensional Systems and Nanostructures 10, 300-304 (2001).
{2} “Dual Frequency Quantum Cascade Terahertz Emitter,” V. M. Menon, W. D. Goodhue, A. S. Karakashian, A. Naweed, J. Plant, L. R. Ram-Mohan, A. Gatesman, V. Badami, J. Waldman, Applied Physics Letters 80, 2454-2456 (2002).
{1} “Role of Interface Phonons in Quantum Cascade Terahertz Emitters,” V. M. Menon, L. R. Ram-Mohan, W. D. Goodhue, A. J. Gatesman, A. S. Karakashian, Physica B 316-317, 212-215 (2002).
{1} “Phonon Engineered Quantum Cascade Terahertz Emission,” V. M. Menon, L. R. Ram-Mohan, W. D. Goodhue, A. S. Karakashian, A. Naweed, A. Gatesman, J. Waldman, Physica E 15, 197-201 (2002).
{5} “Role of Magnetic/Nonmagnetic Semiconductor Interfaces in Magneto-optical Properties of Small-offset Superlattices,” M. Syed, G. L. Yang, J. K. Furdyna, M. Dobrowolska, S. Lee, and L. R. Ram-Mohan, Phys. Rev B 66, 075213-075233 (2002).
“Variation of inter-well coupling in magnetically tunable multiple quantum wells,” S. Lee, M. Dobrowolska, J. K. Furdyna, and L. R. Ram-Mohan, Physica Status Solidi B 229, 711-716 (2002).
{13} “Response of an extraordinary magnetoresistance read-head to a magnetic bit,” J. Moussa, L. R. Ram-Mohan, A. C. H. Rowe, and S. A. Solin, Journal of Applied Physics 94, 1110-1114 (2003).
“Spin-selective positioning of wave functions in magnetically tunable symmetric triple quantum wells,” S. Lee, M. Dobrowolska, J. K. Furdyna, L. R. Ram-Mohan, Optical Materials 23, 79-82 (2003).
{6} “The Schrödinger-Poisson Selfconsistency in Layered Quantum Semiconductor Structures,” L. R. Ram-Mohan, K. H. Yoo, and J. Moussa, Journal of Applied Physics 95, 3081-3092 (2004).
“Wavefunction Engineering for GaN-based Quantum Wells and Superlattices,” L. R. Ram-Mohan, A. M. Girgis, J.D. Albrecht, C. W. Litton, and T. D. Steiner, 27th International Conference on the Physics of Semiconductors, ed. J. Menendez and C. G. Van de Walle, pp. 941-942 (Am. Inst. Phys., Melville, NY, 2005).
{1}Invited Paper:“A Lagrangian Approach to Wavefunction Engineering of Layered Quantum Semiconductor Structures,” L. R. Ram-Mohan, Proc. of the 31st Int. Symposium on Compound Semiconductors, Seoul, Korea, September 12-16, 2004, edited by Y.-S. Kwon, T. Yao, K.-H. Yoo, H. Hasegawa, J. C. Woo, Institute of Physics Conference Series Number 184, pp 1-8, (IoP, Bristol, UK, 2005).
“Dependence of Optical Matrix Elements on the Boundary Conditions of the Continuum States in Quantum Wells,” Y. R. Jang, K. H. Yoo, L. R. Ram-Mohan, Journal of the Optical Society of Korea 9, 39-44 (2005).
{1} “Dependence of the interband transitions on the In mole-fraction and the applied electric field in InxGa1-xAs/In0.52Al0.48As multiple quantum wells,” J. H. Kim, J. T Woo, I. Lee, T. W. Kim, K. H. Yoo, M. D. Kim and L. R. Ram-Mohan, Applied Surface Science 252, 1716-1722 (2005).
{4} “Determination and Assessment of Ternary Interdiffusion Coefficients from Individual Diffusion Couples,” K. M. Day, L. R. Ram-Mohan, and M. A. Dayananda, Journal of Phase Equilibria and Diffusion 26, 579-590 (2005).
{1} “Extraordinary Optoconductance in Semiconductor-Metal Hybrid Structures,” K. Wieland, Y. Wang, L. R. Ram-Mohan, S. A. Solin, and A. M. Girgis, Applied Physics Letters 88, 052105-052108 (2005).
{1}“Wavefunction engineering of layered wurtzite semiconductors grown along arbitrary crystallographic directions,” L. R. Ram-Mohan, A. M. Girgis, J. D. Albrecht, and C. W. Litton, Superlattices and Microstructures 39, 455-477 (2006).
Invited Paper: “Wavefunction Engineering of Layered Quantum Semiconductor Structures: Recent Progress,” L. R. Ram-Mohan, in Progress in Semiconductor Materials V -- Novel Materials and Electronic and Optoelectronic Applications, edited by L. J. Olafson, R. M. Biefeld, M. C. Wanke, A. W. Saxler (Mater. Res. Soc. Symp. Proc. 891, Warrendale, PA, 2005), pp. 0891:EE02:061-0612.
{4} “A Transfer Matrix Method for the Calculation of Concentrations and Fluxes in Multicomponent Diffusion Couples,” L. R. Ram-Mohan and M. A. Dayananda, Acta Materialia 54, 2325-2334 (2006).
“A Transfer Matrix Method for Analysis of Multicomponent Diffusion with Any Number of Components,” L. R. Ram-Mohan and M. A. Dayananda, in Multicomponent-Multiphase Diffusion Symposium in Honor of Mysore A. Dayananda, Journal of Phase Equilibria and Diffusion 27, 566-571 (2006).
{1} “Experimental Measurement and Finite Element Modeling of Extraordinary Optoconductance in GaAs-In Metal-Semiconductor Hybrid Structures,” K. Wieland, Y. Wang, S. A. Solin, A. M. Girgis, and L. R. Ram-Mohan, Physical Review B 73, 155305-155312 (2006).
Invited Review Article: “Wavefunction Engineering of Layered Semiconductors: Theoretical Foundations,” L. R. Ram-Mohan and K.-H. Yoo, Journal of Physics: Condensed Matter, 18, R1–R17 (2007).
{1}“Spontaneous Magnetization in Diluted Magnetic Semiconductor Quantum Wells,” S. T. Jang, K. H. Yoo and L. R. Ram-Mohan, Proceedings of the Thirteenth International Symposium on Physics of Semiconductors and Applications, Korea; Journal of the Korean Physical Society 50, 834-838 (2007).
“A Transfer Matrix Analysis of Quaternary Diffusion,” K. Kulkarni, A. M. Girgis, L. R. Ram-Mohan, and M. A. Dayananda, Philosophical Magazine 87, 853-872 (2007).
“Extraordinary Optoconductance in In-GaAs and In-InSb Metal-Semiconductor Hybrid Structures,” K. A. Wieland, Yun Wang, S. A. Solin, A. M. Girgis, and L. R. Ram-Mohan, 28th International Conference on the Physics of Semiconductors, Vienna, Austria, AIP conf. Proc. 893, 1465 (2007).
Invited Review Article: “Geometry-driven Magnetoresistance,” S. A. Solin and L. R. Ram-Mohan, in The Handbook of Magnetism and Advanced Magnetic Materials, edited by H. Krönmuller and S. Parkin, Volume 5: Spintronics and Magnetoelectronics, pp 1-21 (J. Wiley, New York, 2007).
“Optimizing the Physical Contribution to the Sensitivity and Signal-to-Noise Ratio of Extraordinary Magnetoresistance Quantum Well Structures,” Y. Shao, S. A. Solin, L. R. Ram-Mohan and K. H. Yoo, Journal of Applied Physics 101, 123704-123712 (2007).
“A Matrix Green’s function analysis of multicomponent diffusion in multilayered assemblies,” K. Kulkarni, L. R. Ram-Mohan, and M. A. Dayananda, Journal of Applied Physics 102, 064908-064912 (2007).
“Electronic parameter and subband structure variations due to an embedded AlN potential barrier layer in Al0.3Ga0.7N/GaN heterostructures,” S. M. Han, S. Y. Kim, D. C. Choo, J. I. Jung, T. W. Kim, K. H. Yoo, Y. H. Jo, M. H. Jung, H. I. Cho, J. H. Lee, and L.R. Ram-Mohan, Surface Review and Letters 14, 807-811 (2007).
“Size-dependent impurity ionization in GaN nanowires,” J. Yoon, I. Shalish, A. M. Girgis, L. R. Ram-Mohan, and V. Narayanamurti, Physical Review Letters, submitted for publication (2007).
“Analysis of multi-component multiphase metallic diffusion couples: Data fitting and extraction of averaged diffusion coefficients,” L. R. Ram-Mohan and M. A. Dayananda, submitted for publication (2007).

Publications in Refereed Conference Proceedings

Note: This list does not include short presentations at professional society meetings, such as the annual March meeting of the American Physical Society. Only a list of peer-reviewed reports is given here.

Invited Talk: “Far-Infrared Magnetospectroscopy of HgTe-CdTe Superlattices in the Semimetallic Regime,” T. Wojtowicz, M. Dobrowolska, J. K. Furdyna, J. R. Meyer, F. J. Bartoli, C. A. Hoffman, and L. R. Ram-Mohan, International School on Semiconductor Compounds (26-31 May 1991, Jaszowiec Poland),
Invited Talk: “Novel Nonlinear Optical Devices Based on Wavefunction-Engineered InAs/GaSb/AlSb Family Heterostructures,” J. R. Meyer, C. A. Hoffman, F. J. Bartoli, and L. R. Ram-Mohan, 2nd Mediterranean Workshop and Topical Meeting on Novel Optical Materials and Applications, 28 May – 2 June 1995, Cetraro Italy (1995).
“Infrared electro-optical modulators employing intervalley transfer in asymmetric double quantum wells,” J. R. Meyer, C. A. Hoffman, F. J. Bartoli, and L. R. Ram-Mohan, Conference on Lasers and Electro-Optics CLEO’95, p359-360 (1995).
Invited Talk: “InAs/GaSb/AlSb Quantum Wells for Infrared Electro-Optic Applications,” C. A. Hoffman, J. R. Meyer, F. J. Bartoli, and L. R. Ram-Mohan, 3rd International Symposium on Long Wavelength Infrared Detectors and Arrays: Physics and Applications, Chicago IL (1995).
Invited Talk: “Novel Nonlinear Optical Devices Based on Wavefunction-Engineered InAs/GaSb/AlSb-Family Heterostructures,” J. R. Meyer, C. A. Hoffman, F. J. Bartoli, and L. R. Ram-Mohan, 2nd Mediterranean Workshop and Topical Meeting on Novel Optical Materials and Applications (28 May – 2 June 1995, Cetraro Italy).
Invited Talk: “Waveguide-mode intersubband second harmonic generation with separate active and phase matching regions,” I. Vurgaftman, J. R. Meyer, and L. R. Ram-Mohan, LEOS Nonlinear Optics Topical Meeting, Maui, Hawaii, July 8-12, (1996).
“Simulation of High-Power Mid-IR Interband Cascade Laser,” I. Vurgaftman, J. R. Meyer, C. L. Felix, and L. R. Ram-Mohan, Optical Society of America Conference on Quantum Optoelectronics, Lake Tahoe, ppQFA2-1/103- QFA2-1/105 (1997).
“Mid-IR Vertical Cavity Surface-Emitting Lasers,” I. Vurgaftman, W. W. Bewley, C. L. Felix, E. H. Aifer, J. R. Meyer, L. Goldberg, D. H. Chow, E. Selvig, and L. R. Ram-Mohan, Fall Meeting of the Materials Research Society, (December 1-5, 1997, Boston, MA), (Awarded Best Contributed Talk of the IR Symposium)
“TE- and TM-Polarized Optoelectronic Properties of HgCdTe Quantum Wells,” V. M. Menon, L. R. Ram-Mohan, I. Vurgaftman, and J. R. Meyer, U.S. Workshop on Physics and Chemistry of II-VI Materials (September, 1999),
“Threat Warning and Target Identification with Ge/SiGe Multi-Spectral Quantum Well Infrared Sensors,” R. A. Soref, L. Friedman, M. J. Noble, D. Schwall and L. R. Ram-Mohan, AFRL Technology Horizons Magazine, vol. 1, 28, (September 2000).
“SiGe/Si Terahertz Lasers and Detectors for Space-Based Communications and Sensing,” R. A. Soref, L. Friedman, M. J. Noble, G. Sun and L. R. Ram-Mohan, AFRL Technology Horizons Magazine, vol. 1, 29, December 2000.
“Predictions of Curie Temperature Enhancements in Ferromagnetic Semiconductor Superlattices Based on Mean Field Theory,” I. Vurgaftman, J. R. Meyer, and L. R. Ram-Mohan, Spintronics Workshop (2002).
“Theory and Simulations for Spin-Based Antimonide Devices,” I. Vurgaftman, J. R. Meyer, L. R. Ram-Mohan, J. K. Furdyna, B. D. McCombe, and H. Luo, Spins in Semiconductors Workshop (Santa Barbara CA, 5-7 January, 2000).
“Spin Relaxation Time Enhancement in Ferromagnetic III-V Semiconductors.” I. Vurgaftman, J. R. Meyer, and L. R. Ram-Mohan, 1st International Conference on Spintronics and Quantum Information Technology (Maui HW, 13-18 May 2001).
“Quasi-Atomistic Modeling of Thin Ferromagnetic Superlattices Using the Effective Bond-Orbital Method,” I. Vurgaftman, J. R. Meyer, and L. R. Ram-Mohan, International Conference on Novel Aspects of Spin-Polarized Transport and Spin Dynamics (Washington DC, 9-11 August 2001).
“Theory of Ferromagnetic Digital Alloys and Dots,” I. Vurgaftman, J. R. Meyer, and L. R. Ram-Mohan, DARPA Mini-Workshop on Spintronics and Spin-photonics in InAs/GaSb-Based Ferromagnetic Semiconductors, (Nashville TN, 22-23 February 2002).

Patents

.“Systems and methods using phonon mediated inter-subband Terahertz laser,” L. R. Ram-Mohan, Vinod Menon, W. D. Goodhue and A. Karakashian, U.S. Patent #6829269; approved December 7, 2004.
“Method and system for finite element modeling and simulation of enhanced magnetoresistance in thin film semiconductors with metallic inclusions,” S. A. Solin, L. R. Ram-Mohan, J. Moussa, J. Sullivan, T. Zhou, and D. R. Hines, U.S. Patent #6937967; approved August 30, 2005.

Text & Reference Book

L. R. Ram-Mohan, “Finite Element and Boundary Element Applications to Quantum Mechanics,” Oxford University Press, NY, August 2002, ~ 615 pages.

Picture of Book

This book provides a physical introduction to the finite element method through the discretization of the action integral. Being a variational approach, the finite element method provides the means for systematically improving accuracy in a natural manner. The action and variational principles are shown to provide means for adaptively improving results in FEM. The method is applied to quantum mechanical problems in a number of areas, such as atomic physics, physics of quantum semiconductor structures and electron transport in mesoscopic structures. The finite element method applied to quantum heterostructures has led to the paradigm of wavefunction engineering using which heterostructures have been successfully designed for opto-electronic applications--the design of the Quantum Interband Cascade laser is described. The finite element method is applied to the solution of nonlinear Schrödinger equations such as the Ginzburg-Landau equation in superconductivity.

The Green’s function approach to the boundary integral relation, together with its discretization leading to the boundary element method, is presented from fundamentals The method is applied to the calculation of electric field enhancements at metallic surfaces due to surface plasmon excitations, to quantum mechanical scattering, and to quantum waveguides.

The material is aimed at senior undergraduates, graduate students, and those interested in computational methods and their applications to physical problems.

Reviewer's Comments

This is an impressive manuscript of a book, which is bound to open new ground for future aspiring physicists, particularly those interested in condensed matter physics and chemistry. The book has eighteen Chapters broken into five parts with a sixth part containing three Appendices giving details of special topics of constant use in the development of this book. The author has done a marvelous job of doing all this in only ~600 pages! The book covers a lot of ground in modern quantum mechanical description of condensed matter. It is a unified and careful exposition of Finite Element and Boundary Element methods applied to a large corpus of problems from simple quantum systems to quantum waveguides including time-dependent applications. Thus the author has rightfully introduced the reader to the new field of "wave-function engineering.." The treatment of Schrödinger - Poisson equations that are the first set of self-consistent equations to be solved in condensed matter problems is very well done. The author includes treatment of realistic systems under the influence of external fields, in various geometric configurations, etc., all of which are very important. Finally, he has an important chapter on time-dependent problems, which are only being examined seriously in recent times. Here he brings together different approaches from disparate fields under the aegis of solving the equations that arise as one single stationary action principle and presents a clear picture of what is involved in solving the time-dependent problems in contrast to stationary problems. My overall impression of this book is that it is going to be an important textbook for senior undergraduates, graduate students, as well as research workers whether they are advanced or beginning their career. The book has many gems in it not often spelled out in textbooks and is very current in its approach because it combines neatly the analytical and computational aspects. It contains references to a very large body of literature, which adds to the usefulness of the book for advanced research workers. I believe that the author by writing this book has made the methods of Finite Element and Boundary Element as methods of choice in condensed matter physics and chemistry!
The book is generally well structured and remarkably comprehensive. Particularly nice to see was the inclusion of a chapter on sparse matrix methods -- critical to the practical implementation of finite-element methods and all too often neglected. A chapter was (quite rightly) devoted to atomic systems. The book is well written and fills a significant gap in the literature. I would wholeheartedly recommend it to students and colleagues alike.
The book is well organized, and it covers an excellent selection of very good topics. Solution of Schrödinger equation, self-consistent model including Poisson equation, effects of magnetic field, and design of mid-IR type-II quantum-well lasers are excellent topics and state-of-the art research topics, on which the author has personally made a significant contribution that have been recognized. The 2D applications of FEM and Part V on BEM are all very useful. I am glad to see that the author is able to put all these subjects together in a compact textbook. The book is clear to follow for senior undergraduate, graduate students and researchers in the field. The style of presentation is professional.

Software Development at Quantum Semiconductor Algorithms, Inc.

Commercially available software for wavefunction engineering design of layered quantum semiconductor structures for mid-IR lasers was developed through my company Quantum Semiconductor Algorithms, Inc., with SBIR funding from DARPA, and BMDO. MultiDiFlux software for analysis and determination of diffusion coefficients occurring in multi-component multiphase metallic diffusion couples was developed with support through Purdue University with funding from the NSF, and is freely available on the web. Work on EMR-Explorer was supported by NEC Research Institute. Other items of software were developed at QSA through internal funds.

FEMB -- software for the electronic band structure in layered quantum semiconductor heterostructures using the Finite Element Method was developed in 1993. This software was instrumental in the design and development of the interband quantum cascade laser in the mid-IR that is now commercially available for chemical sensing applications. Developed by L. R. Ram-Mohan. This software is used by 30 universities and government laboratories, and nearly 200 journal articles have been generated using it. http://users.rcn.com/qsa/Index.html
TBM_One -- software for the electronic band structure in layered quantum semiconductor heterostructures using the tight-binding model was developed in 1996. Developed by L. R. Ram-Mohan and L. C. Lew Yan Voon. This software is used by 30 universities and government laboratories. http://users.rcn.com/qsa/Index.html
Optel-ZB -- Finite element based software for the modeling of electronic band structure in layered zinc-blende semiconductor structures of III-V and II-VI compound semiconductor heterostructures. Band bending due to impurity doping is calculated by iteratively solving the Schrödinger-Poisson problem. This software also models magneto-optical effects in heterostructures in the Faraday and the Voigt geometries. Developed by L. R. Ram-Mohan in 2002.
EMR-Explorer -- The phenomenon of extraordinary magnetoresistance (EMR) is a remarkable enhancement of the magnetoresistance of metal-semiconductor hybrid structures that is based on the geometry of the metallic inclusions in a semiconductor. This software allows the modeling of the effect in any arbitrarily shaped semiconductor layer with an arbitrary distribution of metallic inclusions in it. The 4-probe Hall measurements show enhanced MR that depends strongly on the geometry of the 2D heterostructure. Read-heads with very high responses to magnetic bits passing under them in computer hard-drives can be designed with this software. The software was developed at QSA by L. R. Ram-Mohan and J. Moussa, in 2001-2003, for NEC Research Institute.
MultiDiFlux software -- was developed by L. R. Ram-Mohan and M. A. Dayananda in 2004 for the analysis of metallic multi-phase diffusion in multi-component metallic couples. This software is freely available on the web at https://engineering.purdue.edu/MSE/Fac_Staff/Faculty/ dayananda.wshtml
The software “Reflect” was developed by L. R. Ram-Mohan, in 2001, for the characterization of multi-layered semiconductor structures through non-destructive means. Experimentally measured IR reflectance spectra are fitted, with genetic algorithm techniques, using the transfer matrix method, including calculated line widths for phonon and plasmon contributions to the dielectric functions in each layer. This software has been incorporated in commercially available instrumentation from Accent Optical Technologies.
“SMP4,” software for matrix analysis of sparse matrices, was developed by L. R. Ram-Mohan and several consultants under his supervision at QSA over the period 1994-2004, for applications in finite element analysis.
“nD-FEM,” was developed by L. R. Ram-Mohan and A. M. Girgis, for applications of the finite element method to physical problems in any number of dimensions, over the period 2003-2005.
“Optimizer-Pack,” a software package developed by L. R. Ram-Mohan and W. Schudy for optimization of multi-quantum well laser design. Given a required wavelength for emission, the optimization works with the finite element software to define the needed semiconductor heterostructure geometry for the laser; developed during 2001-2005.
“Optel-WZ,” a software package developed by L. R. Ram-Mohan for the wavefunction engineering of Wurtzite structured GaN/AlN/InN or ZnO/MgO layered semiconductor structures for optoelectronics applications. Developed by L. R. Ram-Mohan at QSA during 2002-2006.

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