Modeling the capture probability and enhancing the photoconductive gain in quantum well infrared photodetectors (QWIPs)

M. A. Gadir; P. Harrison; R. A. Soref

doi:10.1016/S1350-4495(03)00168-3

Modeling the capture probability and enhancing the photoconductive gain in quantum well infrared photodetectors (QWIPs)

M. A. Gadir, P. Harrison, R. A. Soref

Research output: Contribution to journal › Conference article › peer-review

1 Citation (Scopus)

Abstract

In this work consideration is given to the dynamics of carriers in the continuum/quantum well systems and how this relates to the photoconductive gain of quantum well infrared photodetectors. In particular the quantum mechanical scattering theory approach, taking into account e-LO phonon and e-e scattering is invoked to evaluate the capture probability from the continuum into the quantum wells. It is shown that the capture probability P_c is dependent on the quantum well width. The capture probability microscopic model is then utilized to introduce an additional tunnel barrier to disturb the continuum levels near the top of the quantum well. This induction enabled us to investigate the double-barrier improvements in the photoconductive gain.

Original language	English
Pages (from-to)	481-485
Number of pages	5
Journal	Infrared Physics and Technology
Volume	44
Issue number	5-6
Early online date	12 Aug 2003
DOIs	https://doi.org/10.1016/S1350-4495(03)00168-3
Publication status	Published - 1 Oct 2003
Externally published	Yes
Event	Workshop on Quantum Well Infrared Photodetectors - Torino, Italy Duration: 13 Oct 2002 → 17 Oct 2002

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title = "Modeling the capture probability and enhancing the photoconductive gain in quantum well infrared photodetectors (QWIPs)",

abstract = "In this work consideration is given to the dynamics of carriers in the continuum/quantum well systems and how this relates to the photoconductive gain of quantum well infrared photodetectors. In particular the quantum mechanical scattering theory approach, taking into account e-LO phonon and e-e scattering is invoked to evaluate the capture probability from the continuum into the quantum wells. It is shown that the capture probability Pc is dependent on the quantum well width. The capture probability microscopic model is then utilized to introduce an additional tunnel barrier to disturb the continuum levels near the top of the quantum well. This induction enabled us to investigate the double-barrier improvements in the photoconductive gain.",

keywords = "Capture probability, Continuum, Photoconductive gain, Scattering, Tunneling barrier",

author = "Gadir, {M. A.} and P. Harrison and Soref, {R. A.}",

note = "Funding Information: The authors would like to thank the Air Force Office of Scientific Research (AFOSR/NE) and the USAF European Office of Aerospace Research and Development for financial support (EOARD grant reference F61775-01-WE007). ; Workshop on Quantum Well Infrared Photodetectors, QWIP 2002 ; Conference date: 13-10-2002 Through 17-10-2002",

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T1 - Modeling the capture probability and enhancing the photoconductive gain in quantum well infrared photodetectors (QWIPs)

AU - Gadir, M. A.

AU - Harrison, P.

AU - Soref, R. A.

N1 - Funding Information: The authors would like to thank the Air Force Office of Scientific Research (AFOSR/NE) and the USAF European Office of Aerospace Research and Development for financial support (EOARD grant reference F61775-01-WE007).

PY - 2003/10/1

Y1 - 2003/10/1

N2 - In this work consideration is given to the dynamics of carriers in the continuum/quantum well systems and how this relates to the photoconductive gain of quantum well infrared photodetectors. In particular the quantum mechanical scattering theory approach, taking into account e-LO phonon and e-e scattering is invoked to evaluate the capture probability from the continuum into the quantum wells. It is shown that the capture probability Pc is dependent on the quantum well width. The capture probability microscopic model is then utilized to introduce an additional tunnel barrier to disturb the continuum levels near the top of the quantum well. This induction enabled us to investigate the double-barrier improvements in the photoconductive gain.

AB - In this work consideration is given to the dynamics of carriers in the continuum/quantum well systems and how this relates to the photoconductive gain of quantum well infrared photodetectors. In particular the quantum mechanical scattering theory approach, taking into account e-LO phonon and e-e scattering is invoked to evaluate the capture probability from the continuum into the quantum wells. It is shown that the capture probability Pc is dependent on the quantum well width. The capture probability microscopic model is then utilized to introduce an additional tunnel barrier to disturb the continuum levels near the top of the quantum well. This induction enabled us to investigate the double-barrier improvements in the photoconductive gain.

KW - Capture probability

KW - Continuum

KW - Photoconductive gain

KW - Scattering

KW - Tunneling barrier

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U2 - 10.1016/S1350-4495(03)00168-3

DO - 10.1016/S1350-4495(03)00168-3

M3 - Conference article

AN - SCOPUS:0141973677

VL - 44

SP - 481

EP - 485

JO - Infrared Physics

JF - Infrared Physics

SN - 1350-4495

IS - 5-6

T2 - Workshop on Quantum Well Infrared Photodetectors

Y2 - 13 October 2002 through 17 October 2002

ER -

Modeling the capture probability and enhancing the photoconductive gain in quantum well infrared photodetectors (QWIPs)

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