On-chip picosecond pulse detection and generation using graphene photoconductive switches

Abstract

We report on the use of graphene for room temperature on-chip detection and generation of pulsed terahertz (THz) frequency radiation, exploiting the fast carrier dynamics of light-generated hot carriers, and compare our results with conventional low-temperature-grown gallium arsenide (LT-GaAs) photoconductive (PC) switches. Coupling of picosecond-duration pulses from a biased graphene PC switch into Goubau line waveguides is also demonstrated. A Drude transport model based on the transient photoconductance of graphene is used to describe the mechanism for both detection and generation of THz radiation.

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Item Type:	Article
Authors/Creators:	Hunter, N Mayorov, AS Wood, CD https://orcid.org/0000-0003-1679-5410 Russell, C https://orcid.org/0000-0002-7322-8255 Li, L https://orcid.org/0000-0003-4998-7259 Linfield, EH Davies, AG https://orcid.org/0000-0002-1987-4846 Cunningham, JE https://orcid.org/0000-0002-1805-9743
Copyright, Publisher and Additional Information:	(c) 2015, American Chemical Society. This is an open access article published under a Creative Commons Attribution (CC-BY) License, which permits unrestricted use, distribution and reproduction in any medium, provided the author and source are cited.
Keywords:	Graphene; On-chip; THz detection; GaAs; Goubau line; Photoconductive switch
Dates:	Published: 11 March 2015 Published (online): 24 February 2015
Institution:	The University of Leeds
Academic Units:	The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Electronic & Electrical Engineering (Leeds) > Pollard Institute (Leeds)
Depositing User:	Symplectic Publications
Date Deposited:	22 Apr 2015 14:03
Last Modified:	23 Jun 2023 21:45
Published Version:	http://dx.doi.org/10.1021/nl504116w
Status:	Published
Publisher:	American Chemical Society
Identification Number:	10.1021/nl504116w
Open Archives Initiative ID (OAI ID):	oai:eprints.whiterose.ac.uk:84102

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On-chip picosecond pulse detection and generation using graphene photoconductive switches

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