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Proceedings Paper

Novel grating-coupled step-bound-to-miniband transition InGaAs/GaAs/AlGaAs multiquantum well infrared photodetector
Author(s): Larry S. Yu; Yanhua H. Wang; Sheng S. Li; Pin Ho
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Paper Abstract

A metal grating coupled step-bound-to-miniband (SBTM) transition multiquantum well long wavelength infrared photodetector (LWIP) using a lightly strained In0.07Ga0.93As quantum well with a short-period Al0.4Ga0.6As -GaAs superlattice barrier structure has been developed. The new structure created a potential `step' in the superlattice barrier to block the undesirable electron tunneling current from the heavily doped ground state in the quantum well, which results in a significant reduction in the device dark current. The measured absorbance spectra and photocurrent are in good agreement with our theoretical predictions. The responsivity R(lambda ) at Vb equals 6 V and T equals 77 K was found equal to 0.2, 0.15 A/W for the backside, and front normal incident illumination, respectively.

Paper Details

Date Published: 1 September 1992
PDF: 9 pages
Proc. SPIE 1685, Infrared Detectors and Focal Plane Arrays II, (1 September 1992); doi: 10.1117/12.137800
Show Author Affiliations
Larry S. Yu, Univ. of Florida (United States)
Yanhua H. Wang, Univ. of Florida (United States)
Sheng S. Li, Univ. of Florida (United States)
Pin Ho, General Electric Co. (United States)

Published in SPIE Proceedings Vol. 1685:
Infrared Detectors and Focal Plane Arrays II
Eustace L. Dereniak; Robert E. Sampson, Editor(s)

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