IMAGE SMEARING IN A QUANTUM WELL INFRARED PHOTODETECTOR INTEGRATED WITH A LIGHT EMITTING DIODE

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Authors
  1. Chiu, S.
  2. Dupont, E.
Corporate Authors
Defence Research Establishment Ottawa, Ottawa ONT (CAN)
Abstract
The recent advances in infrared sensing technology has made it possible to use infrared sensors to support environmental observations, surveillance, threat detection, tracking, and target identification. For ballistic missile defence (BMD) related applications, the most important detector requirements are: high sensitivity, high uniformity, large format, and multicolor capabilities. Quantum well infrared photodetector (QWIP) is a relatively new candidate technology for BMD applications. It has become one of the most promising near-term infrared technologies to meet mid-course detection requirements because of its wavelength flexibility in mid-infrared, far-infrared, and very far infrared regions, as well as multicolor capabilities. Canadian QWIP technology is based on monolithic integration of quantum well infrared photodetector with a light emitting diode (QWIP-LED), and was pioneered by Dr. H.C. Liu of Institute for Microstructural Sciences, National Research Council of Canada. The goal of the present program is to realize a 1X1 cubic square two-color QWIP-LED imaging device by March 20001 and, eventually, to develop a very large format (up to 4X4 cubic square) prototype imaging camera. The success of the QWIP-LED depends critically on the extent of spatial lateral spreading of both photcurrent generated in the QWIP and near infrared photons emitted by the LED as they escape from the QWIP-LED layers. TRUNCATED
Keywords
Quantum well detectors;QWIP(Quantum Well Infrared Photodetectors);Thermal detectors;Quantum wells;External quantum efficiency;Internal quantum efficiency;Photon lateral spread;Image smearing;Image resolution;Light Emitting Diode (LED)
Report Number
DREO-1339 —
Date of publication
01 Dec 1998
Number of Pages
30
DSTKIM No
99-00101
CANDIS No
509988
Format(s):
Hardcopy;Document Image stored on Optical Disk

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