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 sem...

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Bibliographic Details
Published in:Applied physics letters 2014-02, Vol.104 (8)
Main Authors: Ravaro, M., Locatelli, M., Viti, L., Ercolani, D., Consolino, L., Bartalini, S., Sorba, L., Vitiello, M. S., De Natale, P.
Format: Article
Language:English
Subjects:
ANTENNAS
Applied physics
CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
DETECTION
ELECTRON MOBILITY
FIELD EFFECT TRANSISTORS
LASERS
NANOSTRUCTURES
Nanowires
Quantum cascade lasers
Raster scanning
Semiconductor devices
SEMICONDUCTOR MATERIALS
SIGNAL-TO-NOISE RATIO
SPATIAL RESOLUTION
THZ RANGE
Transistors
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Summary: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.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.4867074