Space charge buildup in quantum-well infrared photodetectors leading to low-power nonlinear photoresponse

A. Sa'ar; C. Mermelstein; H. Schneider; C. Schoenbein; M. Walther

doi:10.1109/68.720297

Space charge buildup in quantum-well infrared photodetectors leading to low-power nonlinear photoresponse

A. Sa'ar^*, C. Mermelstein, H. Schneider, C. Schoenbein, M. Walther

^*Corresponding author for this work

Racah Institute of Physics

Research output: Contribution to journal › Article › peer-review

16 Scopus citations

Abstract

Space charge buildup in quantum-well infrared photodetectors (QWIP's) is shown to be the main reason for the low-power nonlinear photoresponse of the QWIP's. We present a model that takes into account the space charge distribution across the quantum wells and derive a simple expression for the intensity dependent responsivity of the QWIP. A comparison of our model with a set of intensity dependent responsivity measurements performed on a 50-period QWIP shows a very good agreement with our model as long as the QWIP is far from saturation.

Original language	English
Pages (from-to)	1470-1472
Number of pages	3
Journal	IEEE Photonics Technology Letters
Volume	10
Issue number	10
DOIs	https://doi.org/10.1109/68.720297
State	Published - Oct 1998

Bibliographical note

Funding Information:
Manuscript received May 8, 1998; revised June 22, 1998. The work of A. Sa’ar and C. Mermelstein was supported by the Israeli Ministry of Science under Grant 5856. The work of H. Schneider, C. Schoenbein, and M. Walther was supported by the Bundesministerium fuer Verteidigung.

Keywords

GaAs
Nonlinear photoresponse
Quantum-well infrared photodetectors (QWIPs)
Semiconductor infrared detetors

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10.1109/68.720297

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title = "Space charge buildup in quantum-well infrared photodetectors leading to low-power nonlinear photoresponse",

abstract = "Space charge buildup in quantum-well infrared photodetectors (QWIP's) is shown to be the main reason for the low-power nonlinear photoresponse of the QWIP's. We present a model that takes into account the space charge distribution across the quantum wells and derive a simple expression for the intensity dependent responsivity of the QWIP. A comparison of our model with a set of intensity dependent responsivity measurements performed on a 50-period QWIP shows a very good agreement with our model as long as the QWIP is far from saturation.",

keywords = "GaAs, Nonlinear photoresponse, Quantum-well infrared photodetectors (QWIPs), Semiconductor infrared detetors",

author = "A. Sa'ar and C. Mermelstein and H. Schneider and C. Schoenbein and M. Walther",

note = "Funding Information: Manuscript received May 8, 1998; revised June 22, 1998. The work of A. Sa{\textquoteright}ar and C. Mermelstein was supported by the Israeli Ministry of Science under Grant 5856. The work of H. Schneider, C. Schoenbein, and M. Walther was supported by the Bundesministerium fuer Verteidigung.",

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doi = "10.1109/68.720297",

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AU - Schoenbein, C.

AU - Walther, M.

N1 - Funding Information: Manuscript received May 8, 1998; revised June 22, 1998. The work of A. Sa’ar and C. Mermelstein was supported by the Israeli Ministry of Science under Grant 5856. The work of H. Schneider, C. Schoenbein, and M. Walther was supported by the Bundesministerium fuer Verteidigung.

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AB - Space charge buildup in quantum-well infrared photodetectors (QWIP's) is shown to be the main reason for the low-power nonlinear photoresponse of the QWIP's. We present a model that takes into account the space charge distribution across the quantum wells and derive a simple expression for the intensity dependent responsivity of the QWIP. A comparison of our model with a set of intensity dependent responsivity measurements performed on a 50-period QWIP shows a very good agreement with our model as long as the QWIP is far from saturation.

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KW - Semiconductor infrared detetors

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Space charge buildup in quantum-well infrared photodetectors leading to low-power nonlinear photoresponse

Abstract

Bibliographical note

Keywords

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