Light detector using intersub-valence band transitions with stra

Active solid-state devices (e.g. – transistors – solid-state diode – Thin active physical layer which is – Heterojunction

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257 21, 257188, 257189, 257190, H01L 3104, H01L 29205

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active

053130731

ABSTRACT:
An intersub-valence band quantum well detector (52), comprising alternating quantum wells (30') and barriers (32'), provided with differential strain permits obtaining hole mean free paths similar to the electron. Consequently, the gain and responsivity should dramatically increase. In addition, the absorption coefficient should increase, while the noise current should decrease; thus, the quantum efficiency and the detectivity (D*) should increase, compared to a detector without the added differential strain.

REFERENCES:
patent: 4607272 (1986-08-01), Osbourn
patent: 4616241 (1986-10-01), Biefeld
patent: 4843439 (1989-06-01), Cheng
patent: 4894526 (1990-01-01), Bethea et al.
patent: 5001521 (1991-03-01), Okuda
patent: 5013918 (1991-05-01), Choi
West et al., "First observation of an extremely large-dipple infrared transition within the conduction band of a GaAs quantum well", in Applied Physics Letters, vol. 46, pp. 1156-1158 (1985).
Levine et al., "High sensitivity low dark current 10 um GaAs quantum well infrared photodetectors", in Applied Physics Letters, vol. 56, pp. 851-853 (1990).
Coon et al., "New mode of IR detection using quantum wells", in Applied Physics Letters, vol. 45, pp. 649-651 (1984).
Levine et al., "Normal incidence hole intersubband absorption long wavelength GaAs/Al.sub.x Ga.sub.1-x As quantum well infrared photodetectors", in Applied Physics Letters, vol. 59, pp. 1864-1866 (1991).
G. Ji et al, "Optical investigation of highly strained InGaGa-GaAs multiple quantum wells", in Journal of Applied Physics, vol. 62, pp. 3366-3373 (1987).
J. W. Matthews et al., "Defects in Epitaxial Multiplayers. I. Misfit Dislocations", in Journal of Crystal Growth, vol. 27, pp. 118-125 (1974).
J. P. Hirth et al., "Damage of coherent multilayer structures by injection of dislocations or cracks", in Journal of Applied Physics, vol. 60, pp. 2372-2376 (1986).
J. W. Matthews et al., "Almost perfect epitaxial multilayers", in Journal of Vacuum Science and Technology, vol. 14, pp. 898-991 (1977).
S. Adachi, "GaAs, AlAs, and Al.sub.x Ga.sub.1-x As: Material parameters for use in research and device applications", in Journal of Applied Physics, vol. 58, pp. R1-R29 (1985).
E. L. Derniak et al., in Optical Radiation Detectors, John Wiley & Sons, Inc., New York, p. 97 (1984).
H. Asai et al., "Intersubband absorption in highly strained InGaAs/InAlAs multiquantum wells", in Applied Physics Letters, vol. 56, pp. 746-748 (Feb. 19, 1990).

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