Two-color infrared detector
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United States of America Patent
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May 12, 1998
Issued Date -
N/A
app pub date -
Sep 14, 1994
filing date -
Aug 16, 1993
priority date (Note) -
Expired
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Abstract
A two-color infrared detector (50) is provided comprising elements (10, 110, or 210) having one or more diodes (58, 158 and 168) and a metal insulator semiconductor ('MIS') device (56 and 156). The infrared detector (50) may be referred to as a vertically integrated capacitor diode. The diodes comprise regions (12, 14, 16, 112, 114, and 116) of semiconductor materials which are operable to generate electron-hole pairs when struck by infrared radiation (40) having first and second wavelengths. The capacitor (156) includes a gate (24) provided by the MIS device which is operable to generate a potential well in the first semiconductor region (12 and 112) in conjunction with an insulator layer (22) and collect charges generated by the first wavelength of infrared radiation (40). The layers of semiconductor material may be varied to enhance the performance of the resulting infrared detector.
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