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Proceedings Paper

Three-color quantum dots in a well infrared photodetector
Author(s): Sanjay Krishna; Sunil Raghavan; Greg von Winckel; Andreas Stintz; Gamini Ariyawansa; Steven Matsik; Unil Perera; Dang Le; David A. Cardimona
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Paper Abstract

A three color normal incidence quantum dots in a well (DWELL) operating in the mid-wave infrared (MWIR), long wave infrared (LWIR) and very long wave infrared (VLWIR) are reported. The peak operating wavelengths are at ~ 6 mm, ~10.5 mm and ~ 23.2 mm. We believe that the shorter wavelength response (6 mm and 10.5 mm) are due to bound-to-continuum and bound-to-bound transitions between the states in the dot and states in the well, whereas the longer wavelength response (23.2 mm) is due to intersubband transition between dot levels. A bias dependent activation energy ~ 100 meV was extracted from the Arrhenious plots of the dark currents, which is a factor of three larger than that observed in quantum well infrared photodetectors operating at comparable wavelengths.

Paper Details

Date Published: 4 November 2004
PDF: 4 pages
Proc. SPIE 5543, Infrared Spaceborne Remote Sensing XII, (4 November 2004); doi: 10.1117/12.561344
Show Author Affiliations
Sanjay Krishna, Ctr. for High Technology Materials/Univ. of New Mexico (United States)
Sunil Raghavan, Ctr. for High Technology Materials/Univ. of New Mexico (United States)
Greg von Winckel, Ctr. for High Technology Materials/Univ. of New Mexico (United States)
Andreas Stintz, Ctr. for High Technology Materials/Univ. of New Mexico (United States)
Gamini Ariyawansa, Georgia State Univ. (United States)
Steven Matsik, Georgia State Univ. (United States)
Unil Perera, Georgia State Univ. (United States)
Dang Le, Air Force Research Lab. (United States)
David A. Cardimona, Air Force Research Lab. (United States)


Published in SPIE Proceedings Vol. 5543:
Infrared Spaceborne Remote Sensing XII
Marija Strojnik, Editor(s)

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