Resonant terahertz detection using graphene plasmons

Denis A. Bandurin (), Dmitry Svintsov, Igor Gayduchenko, Shuigang G. Xu, Alessandro Principi, Maxim Moskotin, Ivan Tretyakov, Denis Yagodkin, Sergey Zhukov, Takashi Taniguchi, Kenji Watanabe, Irina V. Grigorieva, Marco Polini, Gregory N. Goltsman, Andre K. Geim and Georgy Fedorov ()
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Denis A. Bandurin: University of Manchester
Dmitry Svintsov: Moscow Institute of Physics and Technology (State University)
Igor Gayduchenko: Moscow Institute of Physics and Technology (State University)
Shuigang G. Xu: University of Manchester
Alessandro Principi: University of Manchester
Maxim Moskotin: Moscow Institute of Physics and Technology (State University)
Ivan Tretyakov: Moscow State University of Education (MSPU)
Denis Yagodkin: Moscow Institute of Physics and Technology (State University)
Sergey Zhukov: Moscow Institute of Physics and Technology (State University)
Takashi Taniguchi: National Institute for Materials Science
Kenji Watanabe: National Institute for Materials Science
Irina V. Grigorieva: University of Manchester
Marco Polini: University of Manchester
Gregory N. Goltsman: Moscow State University of Education (MSPU)
Andre K. Geim: University of Manchester
Georgy Fedorov: Moscow Institute of Physics and Technology (State University)

Nature Communications, 2018, vol. 9, issue 1, 1-8

Abstract: Abstract Plasmons, collective oscillations of electron systems, can efficiently couple light and electric current, and thus can be used to create sub-wavelength photodetectors, radiation mixers, and on-chip spectrometers. Despite considerable effort, it has proven challenging to implement plasmonic devices operating at terahertz frequencies. The material capable to meet this challenge is graphene as it supports long-lived electrically tunable plasmons. Here we demonstrate plasmon-assisted resonant detection of terahertz radiation by antenna-coupled graphene transistors that act as both plasmonic Fabry-Perot cavities and rectifying elements. By varying the plasmon velocity using gate voltage, we tune our detectors between multiple resonant modes and exploit this functionality to measure plasmon wavelength and lifetime in bilayer graphene as well as to probe collective modes in its moiré minibands. Our devices offer a convenient tool for further plasmonic research that is often exceedingly difficult under non-ambient conditions (e.g. cryogenic temperatures) and promise a viable route for various photonic applications.

Date: 2018
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DOI: 10.1038/s41467-018-07848-w

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