DOI: 10.1063/1.122142. Noise gain and detectivity of <i>n</i>-type GaAs/AlAs/AlGaAs quantum well infrared photodetectors

Noise gain and detectivity of n-type GaAs/AlAs/AlGaAs quantum well infrared photodetectors

10.1063/1.122142

Crossref journal-article

AIP Publishing

Applied Physics Letters (317)

Abstract

We have investigated noise currents in GaAs/AlAs/AlGaAs quantum well infrared photodetectors (QWIPs). The specific design of these detectors implies a carrier mean-free path of exactly one period of the superlattice with N=20 periods, leading to a carrier capture probability pc≈1 associated with a noise gain gn=1/N at sufficiently small applied bias voltages. The gain values obtained from our measurements are analyzed using three different noise gain models, which predict different dependencies of the detectivity on the capture probability. Our results indicate that a photoconductive QWIP with pc≈1 should have a higher detectivity than a conventional GaAs/AlGaAs QWIP.

Bibliography

SchÃ¶nbein, C., Schneider, H., Rehm, R., & Walther, M. (1998). Noise gain and detectivity of n-type GaAs/AlAs/AlGaAs quantum well infrared photodetectors. Applied Physics Letters, 73(9), 1251â1253.

Authors 4

C. Schönbein (first)
H. Schneider (additional)
R. Rehm (additional)
M. Walther (additional)

References 9 Referenced 29

{'key': '2024020314522442800_r1'}
10.1109/16.554791 / IEEE Trans. Electron Devices (1997)
10.1063/1.108115 / Appl. Phys. Lett. (1992)
10.1063/1.110105 / Appl. Phys. Lett. (1993)
10.1063/1.352210 / J. Appl. Phys. (1992)
10.1063/1.358972 / J. Appl. Phys. (1995)
10.1063/1.112090 / Appl. Phys. Lett. (1994)
10.1063/1.357713 / J. Appl. Phys. (1994)
10.1063/1.119510 / Appl. Phys. Lett. (1997)

Dates

Type	When
Created	23 years, 1 month ago (July 26, 2002, 9:31 a.m.)
Deposited	1 year, 6 months ago (Feb. 3, 2024, 9:52 a.m.)
Indexed	5 months ago (March 27, 2025, 6:01 a.m.)
Issued	26 years, 11 months ago (Aug. 31, 1998)
Published	26 years, 11 months ago (Aug. 31, 1998)
Published Print	26 years, 11 months ago (Aug. 31, 1998)

Funders 0

None

BibTeX

@article{Sch_nbein_1998, title={Noise gain and detectivity of n-type GaAs/AlAs/AlGaAs quantum well infrared photodetectors}, volume={73}, ISSN={1077-3118}, url={http://dx.doi.org/10.1063/1.122142}, DOI={10.1063/1.122142}, number={9}, journal={Applied Physics Letters}, publisher={AIP Publishing}, author={Schönbein, C. and Schneider, H. and Rehm, R. and Walther, M.}, year={1998}, month=aug, pages={1251–1253} }

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