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

  Articoli su Riviste JCR/ISI  (anno 2014)

Autori:  Ravaro M., Locatelli M., Viti L., Ercolani D., Consolino L., Bartalini S., Sorba L., Vitiello M. S., De Natale P

Affiliazione Autori:  INO, Istituto Nazionale di Ottica, CNR, Largo E. Fermi 6, Firenze I-50125, Italy; LENS, European Laboratory for Nonlinear Spectroscopy, Via N. Carrara 1, Sesto Fiorentino (FI) I-50019, Italy; NEST, Istituto Nanoscienze, CNR and Scuola Normale Superiore, Piazza San Silvestro 12, Pisa I-56127, Italy

Riassunto:  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 approximate to 5 V/W in a bandwidth approximate to 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. (C) 2014 AIP Publishing LLC.

Rivista/Giornale:  APPLIED PHYSICS LETTERS
Volume n.:  104 (8)      Pagine da: 083116  a: 083116
Ulteriori informazioni:  This work was partly supported by the Italian Ministry of Education, University, and Research (MIUR) through the program \"FIRB - Futuro in Ricerca 2010\" RBFR10LULP \"Fundamental research on Terahertz photonic devices.\"
DOI: 10.1063/1.4867074

*Impact Factor della Rivista: (2014) 3.302   *Citazioni: 12
data tratti da "WEB OF SCIENCE" (marchio registrato di Thomson Reuters) ed aggiornati a:  19/05/2019

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