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Proceedings Paper

Radiometric characterization of normal-incidence InAs/In0.15Ga0.85As quantum-dot detectors
Author(s): Sanjay Krishna; Sunil Raghavan; Andreas Stintz; Christian P. Morath; Hillary E. Norton; Dang T. Le; David A. Cardimona; Stephen W. Kennerly
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Paper Abstract

Normal incidence InAs/In0.15Ga0.85As dots-in-a-well detectors operating at T=78K with λcut-off ~8.2 μm and a spectral width (Δλ/λ) of 35% are reported. The peak at 7.2 μm is attributed to the bound-to-bound transitions between the ground state of the dot and the states within the InGaAs well. A broad shoulder around 5 μm, which is attributed to the bound to continuum transition, is also observed. Calibrated blackbody measurements at a device temperature of 78K yield a peak responsivity of 3.58 A/W (Vb=-1V), peak detectivity= 2.7x109cmHz1/2/W (Vb=-0.3V), conversion efficiency of 57% and a gain ~25.

Paper Details

Date Published: 11 November 2002
PDF: 5 pages
Proc. SPIE 4823, Photonics for Space Environments VIII, (11 November 2002); doi: 10.1117/12.453504
Show Author Affiliations
Sanjay Krishna, CHTM/Univ. of New Mexico (United States)
Sunil Raghavan, CHTM/Univ. of New Mexico (United States)
Andreas Stintz, CHTM/Univ. of New Mexico (United States)
Christian P. Morath, Air Force Research Lab. (United States)
Hillary E. Norton, Air Force Research Lab. (United States)
Dang T. Le, Air Force Research Lab. (United States)
David A. Cardimona, Air Force Research Lab. (United States)
Stephen W. Kennerly, Army Research Lab. (United States)

Published in SPIE Proceedings Vol. 4823:
Photonics for Space Environments VIII
Edward W. Taylor, Editor(s)

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