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Proceedings Paper

Quantum 1/f noise theory and experiment in QWIPs
Author(s): Amanda M Truong; Peter H. Handel
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Paper Abstract

The dark current of Quantum Well Inter-subband Photodetectors is known to be affected by quantum 1/f noise. This limits the detectivity. This paper compares various experimental 1/f noise measurements in QWIPs with the prediction of the conventional quantum 1/f noise expression for GaN/AlGaN QWIPs. Both the collisionless and collision-dominated cases are considered. The elementary process causing the dark current is the transfer of an electron from one well to the neighboring well. This happens under the influence of the applied electric field, and has in general both thermally activated and tunneling components. The larger the applied electric field, the larger is the squared velocity change of the carriers, and the larger is the obtained conventional quantum 1/f effect. The detectivity of the devices is calculated on this basis. The results are compared with measurements of 1/f noise in QWIPs by J. Jiang6, C. Jelen7, and M. C. Hsu8, and the agreement is good.

Paper Details

Date Published: 12 March 2010
PDF: 10 pages
Proc. SPIE 7602, Gallium Nitride Materials and Devices V, 76020L (12 March 2010); doi: 10.1117/12.842919
Show Author Affiliations
Amanda M Truong, Univ. of Missouri-St. Louis (United States)
Peter H. Handel, Univ. of Missouri-St. Louis (United States)

Published in SPIE Proceedings Vol. 7602:
Gallium Nitride Materials and Devices V
Jen-Inn Chyi; Yasushi Nanishi; Hadis Morkoç; Cole W. Litton; Joachim Piprek; Euijoon Yoon, Editor(s)

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