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Page 14 of 19: Prev << 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 >> Next (475 Items)
| 326. | The Center for Quantum Devices - extending the scope of photonics
M. Razeghi
III-Vs Review 10 (6)-- October 1, 1997
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| 327. | Photoresponse of InGaAsP-based p-doped quantum well infrared photodetectors
M. Tadic, C. Jelen, S. Slivken, and M. Razeghi
21st International Conference on Microelectronics (MIEL’97), Yugoslavia; Proceedings - Vol. 1-- September 14, 1997
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| 328. | In-plane electron dynamics and hot electron effects in a quantum cascade laser
M. Tadic, C. Jelen, S. Slivken, and M. Razeghi
21st International Conference on Microelectronics (MIEL’97), Yugoslavia; Proceedings - Vol. 1-- September 14, 1997
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| 329. | Growth and characterization of InAs/GaSb photoconductors for long wavelength infrared range
H. Mohseni, E. Michel, J. Sandven, M. Razeghi, W. Mitchel, and G. Brown
Applied Physics Letters 71 (10)-- September 8, 1997
In this letter we report the molecular beam epitaxial growth and characterization of InAs/GaSb superlattices grown on semi-insulating GaAs substrates for long wavelength infrared detectors. Photoconductive detectors fabricated from the superlattices showed photoresponse up to 12 µm and peak responsivity of 5.5 V/W with Johnson noise limited detectivity of 1.33 × 109 cm·Hz½/W at 10.3 µm at 78 K. ...[Visit Journal]
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| 330. | High Carrier Lifetime InSb Grown on GaAs Substrates
E. Michel, H. Mohseni, J.D. Kim, J. Wojkowski, J. Sandven, J. Xu, M. Razeghi, R. Bredthauer, P. Vu, W. Mitchel, and M. Ahoujja
Applied Physics Letters 71 (8-- August 25, 1997
We report on the growth of near bulklike InSb on GaAs substrates by molecular beam epitaxy despite the 14% lattice mismatch between the epilayer and the substrate. Structural, electrical, and optical properties were measured to assess material quality. X-ray full widths at half-maximum were as low as 55 arcsec for a 10 µm epilayer, peak mobilities as high as ~ 125 000 cm2/V s, and carrier lifetimes up to 240 ns at 80 K. ...[Visit Journal]
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| 331. | Schottky barrier heights and conduction-band offsets of In1-xGaxAs1-yPy lattice matched to GaAs
J.K. Lee, Y.H. Cho, B.D. Choe, K.S. Kim, H.I. Jeon, H. Lim and M. Razeghi
Applied Physics Letters 71 (7)-- August 18, 1997
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| 332. | Generalized kp perturbation theory for atomic-scale superlattices
H. Yi and M. Razeghi
Physical Review B 56 (7)-- August 15, 1997
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| 333. | Determination of of Band Gap Energy of Al1-xInxN Grown by Metal Organic Chemical Vapor Deposition in the High Al Composition Regime
K.S. Kim, A. Saxler, P. Kung, M. Razeghi, and K.Y. Lim
Applied Physics Letters 71 (6)-- August 11, 1997
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| 334. | GaN Grown Using Trimethylgallium and Triethylgallium
A. Saxler, P. Kung, X. Zhang, D. Walker, J. Solomon, W.C. Mitchel and M. Razeghi
Defects in Semiconductors, Aveiro, Portugal; Materials Science Forum, 258-263-- July 1, 1997
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| 335. | GaN Doped with Sulfur
A. Saxler, P. Kung, X. Zhang, D. Walker, J. Solomon, M. Ahoujja, W.C. Mitchel, H.R. Vydyanath, and M. Razeghi
Defects in Semiconductors, Aveiro, Portugal; Materials Science Forum, 258-263-- July 1, 1997
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| 336. | Electroluminescence of III-Nitride Double Heterostructure Light Emitting Diodes with Silicon and Magnesium Doped InGaN
A. Saxler, K.S. Kim, D. Walker, P. Kung, X. Zhang, G.J. Brown, W.C. Mitchel and M. Razeghi
Defects in Semiconductors, Aveiro, Portugal; Materials Science Forum, 258-263-- July 1, 1997
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| 337. | Localized Epitaxy for Vertical Cavity Surface Emitting Laser Applications
M. Erdtmann, S. Kim and M. Razeghi
Defects in Semiconductors, Aveiro, Portugal; Materials Science Forum, 258-263-- July 1, 1997
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| 338. | The Long Wavelength Luminescence Observation from the Self-Organized InGaAs Quantum Dots Grown on (100) GaAs Substrate by Metalorganic Chemical Vapor Deposition
S. Kim, M. Erdtmann, and M. Razeghi
Defects in Semiconductors, Aveiro, Portugal; Materials Science Forum, 258-263-- July 1, 1997
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| 339. | Structural and Microstructural Characterization of GaN Thin Films and GaN-based Heterostructures Grown on Sapphire Substrates
M. Razeghi, P. Kung, X. Zhang, D. Walker, A. Saxler, K.Y. Lim and K.S. Kim
Journal of the Korean Physical Society, Proceedings Supplement 30 (S1-S6)-- June 30, 1997
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| 340. | Stability of far fields in double heterostructure and multiple quantum well InAsSb/InPAsSb/InAs midinfrared lasers
H. Yi, A. Rybaltowski, J. Diaz, D. Wu, B. Lane, Y. Xiao, and M. Razeghi
Applied Physics Letters 70 (24)-- June 16, 1997
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| 341. | Growth and characterization of InSbBi for long wavelength infrared photodetectors
J.J. Lee, J.D. Kim, and M. Razeghi
Applied Physics Letters 70 (24)-- June 16, 1997
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| 342. | Quantum Hall liquid-to-insulator transition in In1-xGaxAs/InP heterostructures
W. Pan, D. Shahar, D.C. Tsui, H.P. Wei, and M. Razeghi
Physical Review B 55 (23)-- June 15, 1997
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| 343. | Study on the effects of minority carrier leakage in InAsSb/InPAsSb double heterostructure
B. Lane, D. Wu, H.J. Yi, J. Diaz, A. Rybaltowski, S. Kim, M. Erdtmann, H. Jeon and M. Razeghi
Applied Physics Letters 70 (11)-- April 17, 1997
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| 344. | AlxGa1-xN (0 £ x £ 1) Ultraviolet Photodetectors Grown on Sapphire by Metal-organic Chemical-vapor Deposition
D. Walker, X. Zhang, A. Saxler, P. Kung, J. Xu, and M. Razeghi
Applied Physics Letters 70 (8)-- February 24, 1997
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| 345. | AlGaN ultraviolet detectors
M. Razeghi and A. Rogalski,
SPIE Conference, San Jose, CA, -- February 12, 1997
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| 346. | Intrinsic AlGaN photodetectors for the entire compositional range
D. Walker, X. Zhang, A. Saxler, P. Kung, J. Xu, and M. Razeghi
SPIE Conference, San Jose, CA, "Materials and Devices II"; Proceedings 2999-- February 12, 1997
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| 347. | Very Long Wavelength GaAs/GaInP Quantum Well Infrared Photodetectors
C. Jelen, S. Slivken, G.J. Brown, and M. Razeghi
SPIE Conference, San Jose, CA, "Materials and Devices II"; Proceedings 2999-- February 12, 1997
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| 348. | Sb-based infrared materials and photodetectors for the near room temperature applications
J.D. Kim, E. Michel, H. Mohseni, J. Wojkowski, J.J. Lee and M. Razeghi
SPIE Conference, San Jose, CA, Vol. 2999, pp. 55-- February 12, 1997
We report on the growth of InSb, InAsSb, and InTlSb alloys for infrared photodetector applications. The fabrication and characterization of photodetectors based on these materials are also reported. Both photoconductive and photovoltaic devices are investigated. The materials and detector structures were grown on (100) and (111)B semi-insulating GaAs and GaAs coated Si substrates by low pressure metalorganic chemical vapor deposition and solid source molecular beam epitaxy. Photoconductive detectors fabricated from InAsSb and InTlSb have been operated in the temperature range from 77 K to 300 K. The material parameters for photovoltaic device structures have been optimized through theoretical calculations based on fundamental mechanisms. InSb p-i-n photodiodes with 77 K peak responsivities approximately 103 V/W were grown on Si and (111) GaAs substrates. An InAsSb photovoltaic detector with a composition of x equals 0.85 showed photoresponse up to 13 micrometers at 300 K with a peak responsivity of 9.13 X 10-2 V/W at 8 micrometers . The RoA product of InAsSb detectors has been theoretically and experimentally analyzed. ...[Visit Journal]
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| 349. | Growth models of GaN thin films based on crystal chemistry: Hexagonal and cubic GaN on Si substrates
H. Ohsato and M. Razeghi
SPIE Conference, San Jose, CA, "Materials and Devices II"; Proceedings 2999-- February 12, 1997
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| 350. | Temperature insensitivity of the Al-free InGaAsP/GaAs lasers for l = 808 and 908 nm
M. Razeghi, H. Yi, J. Diaz, S. Kim, and M. Erdtmann
SPIE Conference, San Jose, CA; Proceedings 3001-- February 12, 1997
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