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Title: Two-color detector: Mercury-cadmium-telluride as a terahertz and infrared detector

In this paper, issues associated with the development of infrared (IR) and terahertz (THz) radiation detectors based on HgCdTe are discussed. Two-color un-cooled and cooled to 78 K narrow-gap mercury-cadmium-telluride semiconductor thin layers with antennas were considered both as sub-THz (sub-THz) direct detection bolometers and 3–10 μm IR photoconductors. The noise equivalent power (NEP) for one of the detectors studied at ν ≈ 140 GHz reaches NEP{sub 300 K} ≈ 4.5 × 10{sup −10} W/Hz{sup 1/2} and NEP{sub 78 K} ≈ 5 × 10{sup −9} W/Hz{sup 1/2}. The same detector used as an IR photoconductor showed the responsivity at temperatures T = 78 K and 300 K with signal-to-noise ratio S/N ≈ 750 and 50, respectively, under illumination by using IR monochromator and globar as a thermal source.
Authors:
; ; ; ; ;  [1] ;  [2]
  1. Institute of Semiconductor Physics, 03028 Kiev (Ukraine)
  2. Institute of Semiconductor Physics of SB RAS, 630090 Novosibirsk (Russian Federation)
Publication Date:
OSTI Identifier:
22412694
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 106; Journal Issue: 8; Other Information: (c) 2015 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; ANTENNAS; BOLOMETERS; CADMIUM TELLURIDES; COLOR; DETECTION; GHZ RANGE; ILLUMINANCE; INFRARED RADIATION; MERCURY COMPOUNDS; NOISE; PHOTOCONDUCTORS; RADIATION DETECTORS; SEMICONDUCTOR MATERIALS; SIGNAL-TO-NOISE RATIO; TEMPERATURE DEPENDENCE; THIN FILMS; THZ RANGE; URANIUM NITRIDES