Fast room temperature detection of terahertz quantum cascade lasers with graphene loaded bow-tie plasmonic antenna arrays

Degl'innocenti, Riccardo and Xiao, Long and Jessop, David S and Kindness, Stephen J. and Ren, Yuan and Lin, Hungyen and Zeitler, J. Axel and Alexander-Webber, Jack and Joyce, Hannah and Braeuninger-Weimer, Philipp and Hofmann, Stephan and Beere, Harvey E. and Ritchie, David A. (2016) Fast room temperature detection of terahertz quantum cascade lasers with graphene loaded bow-tie plasmonic antenna arrays. ACS Photonics, 3 (10). pp. 1747-1753. ISSN 2330-4022

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Abstract

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 A/W and a noise-equivalent-power of ~1.5E-7W/Hz1/2

Item Type:
Journal Article
Journal or Publication Title:
ACS Photonics
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/2200/2208
Subjects:
ID Code:
81691
Deposited By:
Deposited On:
22 Sep 2016 08:12
Refereed?:
Yes
Published?:
Published
Last Modified:
08 Apr 2020 03:28