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Title: Detection of a 2.8 THz quantum cascade laser with a semiconductor nanowire field-effect transistor coupled to a bow-tie antenna

The use of a high-electron mobility semiconductor nanowire as transistor channel has recently allowed the extension of the spectral coverage of THz field-effect transistor detectors up to 1.5 THz. In this report, we demonstrate efficient operation of a field-effect transistor detector based on a semiconductor nanowire at a much higher frequency, 2.8 THz, with a responsivity ≈5 V/W in a bandwidth ≈100 kHz, thus proving the full potential of such approach for the detection of THz quantum cascade lasers. Finally, such a THz sensing system is exploited to perform raster scan transmission imaging, with high spatial resolution, signal-to-noise ratio, and acquisition rate.
Authors:
; ; ; ;  [1] ;  [2] ; ; ;  [3] ;  [1] ;  [2]
  1. INO, Istituto Nazionale di Ottica – CNR, Largo E. Fermi 6, Firenze I-50125 (Italy)
  2. (Italy)
  3. NEST, Istituto Nanoscienze – CNR and Scuola Normale Superiore, Piazza San Silvestro 12, Pisa I-56127 (Italy)
Publication Date:
OSTI Identifier:
22293118
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 104; Journal Issue: 8; 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; ANTENNAS; DETECTION; ELECTRON MOBILITY; FIELD EFFECT TRANSISTORS; IMAGES; LASERS; NANOSTRUCTURES; SEMICONDUCTOR MATERIALS; SIGNAL-TO-NOISE RATIO; SPATIAL RESOLUTION; THZ RANGE