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Title: High detectivity short-wavelength II-VI quantum cascade detector

We report on the experimental demonstration of a ZnCdSe/ZnCdMgSe-based short-wavelength photovoltaic Quantum Cascade Detector (QCD). The QCD operates in two spectral bands centered around 2.6 μm and 3.6 μm. Calibrated blackbody measurements yield a peak responsivity of 0.1 mA/W or 2400 V/W at 80 K, and a corresponding 300 K background radiation limited infrared performance detectivity (BLIP) of ∼2.5 × 10{sup 10 }cm √Hz/W. Comparison of background illuminated and dark current-voltage measurements demonstrates a BLIP temperature of 200 K. The device differential resistance-area product, decreases from about 10{sup 6} Ω cm{sup 2} at 80 K to about 8000 Ω cm{sup 2} at 300 K, indicative of the ultra-low Johnson noise in the detectors.
Authors:
;  [1] ; ;  [2] ;  [3]
  1. Department of Electrical Engineering, Princeton University, Princeton, New Jersey 08544 (United States)
  2. Department of Chemistry, The Graduate Center and The City College of New York, CUNY, New York, New York 10031 (United States)
  3. Department of Physics, The Graduate Center and The City College of New York, CUNY, New York, New York 10031 (United States)
Publication Date:
OSTI Identifier:
22320365
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 105; Journal Issue: 6; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; CADMIUM COMPOUNDS; ELECTRIC CONDUCTIVITY; INFRARED SPECTRA; MAGNESIUM COMPOUNDS; PERFORMANCE; PHOTOVOLTAIC EFFECT; QUANTUM MECHANICS; SELENIUM COMPOUNDS; SEMICONDUCTOR DETECTORS; ZINC COMPOUNDS