%0 Journal Article
%T Helicity-sensitive plasmonic terahertz interferometer
%A Matyushkin, Y.
%A Danilov, S.
%A Moskotin, M.
%A Belosevich, V.
%A Kaurova, N.
%A Rybin, M.
%A Obraztsova, E. D.
%A Fedorov, G.
%A Gorbenko, I.
%A Kachorovskii, V.
%A Ganichev, S.
%J Nano Lett.
%D 2020
%V 20
%N 10
%@ 1530-6984
%F Matyushkin_etal2020
%O PMID:32903004
%O exported from refbase (https://db.rplab.ru/refbase/show.php?record=1781), last updated on Tue, 01 Jun 2021 15:02:11 -0500
%X Plasmonic interferometry is a rapidly growing area of research with a huge potential for applications in the terahertz frequency range. In this Letter, we explore a plasmonic interferometer based on graphene field effect transistor connected to specially designed antennas. As a key result, we observe helicity- and phase-sensitive conversion of circularly polarized radiation into dc photovoltage caused by the plasmon-interference mechanism: two plasma waves, excited at the source and drain part of the transistor, interfere inside the channel. The helicity-sensitive phase shift between these waves is achieved by using an asymmetric antenna configuration. The dc signal changes sign with inversion of the helicity. A suggested plasmonic interferometer is capable of measuring the phase difference between two arbitrary phase-shifted optical signals. The observed effect opens a wide avenue for phase-sensitive probing of plasma wave excitations in two-dimensional materials.
%K graphene
%K plasmonic interferometer
%K radiation helicity
%K terahertz radiation
%R 10.1021/acs.nanolett.0c02692
%U http://www.ncbi.nlm.nih.gov/pubmed/32903004
%U https://doi.org/10.1021/acs.nanolett.0c02692
%P 7296-7303