CUED Publications database

Fast Room-Temperature Detection of Terahertz Quantum Cascade Lasers with Graphene-Loaded Bow-Tie Plasmonic Antenna Arrays

Degl'Innocenti, R and Xiao, L and Jessop, DS and Kindness, SJ and Ren, Y and Lin, H and Zeitler, JA and Alexander-Webber, JA and Joyce, HJ and Braeuninger-Weimer, P and Hofmann, S and Beere, HE and Ritchie, DA (2016) Fast Room-Temperature Detection of Terahertz Quantum Cascade Lasers with Graphene-Loaded Bow-Tie Plasmonic Antenna Arrays. ACS Photonics, 3. pp. 1747-1753.

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Abstract

© 2016 American Chemical Society. We present a fast room-temperature terahertz detector based on interdigitated bow-tie antennas contacting graphene. Highly efficient photodetection was achieved by using two metals with different work functions as the arms of a bow-tie antenna contacting graphene. Arrays of the bow-ties were fabricated in order to enhance the responsivity and coupling of the incoming light to the detector, realizing an efficient imaging system. The device has been characterized and tested with a terahertz quantum cascade laser emitting in single frequency around 2 THz, yielding a responsivity of 34 μA/W and a noise-equivalent power of 1.5 × 10 -7 W/Hz 1/2 .

Item Type: Article
Subjects: UNSPECIFIED
Divisions: Div B > Solid State Electronics and Nanoscale Science
Div B > Photonics
Depositing User: Cron Job
Date Deposited: 17 Jul 2017 19:00
Last Modified: 21 Nov 2017 03:07
DOI: