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Proceedings Paper

Development of a visible-NIR/LWIR QWIP sensor
Author(s): Eric Cho; Barbara K. McQuiston; Wah Lim; Sir B. Rafol; Cynthia Hanson; Richard Nguyen; Andy Hutchinson
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Paper Abstract

Quantum Well Infrared Photodetectors (QWIPs) based infrared focal plane arrays (FPAs) have been widely researched and investigated in the 3-5 μm and 6-20 μm wavelength ranges. The demonstrations of QWIP FPAs include single-color, dual-color and even multiple-color, as well as varieties of physical formats in the infrared range. In this paper, we discuss the research and development efforts currently undergoing at QWIP Technologies on dual-color, visible-NIR/LWIR FPAs, as an interim step for a project sponsored by DARPA (Defense Advanced Research Project Agency) to develop a four-color QWIP-based FPA. To the best of our knowledge, this is the first reported result on visible/LWIR QWIP imager, as well as the first reported GaAs PIN diode-based FPA. This device consists of a GaAs/AlGaAs based PIN diode grown on a GaAs substrate, and subsequently a stack of multiple quantum wells (MQWs), epitaxially grown on top of the PIN structure. This VISA (visible/infrared sensor array) structure is sensitive in the 500nm-890nm as well as in the 8um-12 um wavelength ranges. Very high sensitivities are observed from both visible PIN diode and LWIR QWIP; both visible and LWIR images obtained from this device are presented in this paper.

Paper Details

Date Published: 10 October 2003
PDF: 10 pages
Proc. SPIE 5074, Infrared Technology and Applications XXIX, (10 October 2003); doi: 10.1117/12.497512
Show Author Affiliations
Eric Cho, QWIP Technologies, Inc. (United States)
Barbara K. McQuiston, QWIP Technologies, Inc. (United States)
Wah Lim, QWIP Technologies, Inc. (United States)
Sir B. Rafol, Jet Propulsion Lab. (United States)
Cynthia Hanson, Space and Naval Warfare Systems Command San Diego (United States)
Richard Nguyen, Space and Naval Warfare Systems Command San Diego (United States)
Andy Hutchinson, DARPA (United States)

Published in SPIE Proceedings Vol. 5074:
Infrared Technology and Applications XXIX
Bjorn F. Andresen; Gabor F. Fulop, Editor(s)

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