Fast Room-Temperature Detection of Terahertz Quantum Cascade Lasers with Graphene-Loaded Bow-Tie Plasmonic Antenna Arrays
Published version
Peer-reviewed
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Repository DOI
Change log
Authors
Degl'Innocenti, Riccardo https://orcid.org/0000-0003-2655-1997
Xiao, L
Jessop, DS
Kindness, SJ
Ren, Y
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 μA/W and a noise-equivalent power of ∼1.5 × 10
Description
Keywords
graphene, photodetection, terahertz, quantum cascade laser, optical modulator
Journal Title
ACS Photonics
Conference Name
Journal ISSN
2330-4022
2330-4022
2330-4022
Volume Title
3
Publisher
American Chemical Society (ACS)
Publisher DOI
Sponsorship
Engineering and Physical Sciences Research Council (EP/K016636/1)
Engineering and Physical Sciences Research Council (EP/L019922/1)
Engineering and Physical Sciences Research Council (EP/J017671/1)
Engineering and Physical Sciences Research Council (EP/L019922/1)
Engineering and Physical Sciences Research Council (EP/J017671/1)
R.D., Y.R., and H.E.B. acknowledge financial support from the Engineering and Physical Sciences Research Council (Grant No. EP/J017671/1, Coherent Terahertz Systems). S.H. acknowledges funding from EPSRC (Grant No. EP/K016636/1, GRAPHTED). H.L. and J.A.Z. acknowledge financial support from the EPSRC (Grant No. EP/L019922/1). J.A.A.-W. acknowledges a Research Fellowship from Churchill College, Cambridge. H.J.J. thanks the Royal Commission for the Exhibition of 1851 for her Research Fellowship.