TY  - JOUR
AU  - Matyushkin, Y.
AU  - Danilov, S.
AU  - Moskotin, M.
AU  - Belosevich, V.
AU  - Kaurova, N.
AU  - Rybin, M.
AU  - Obraztsova, E. D.
AU  - Fedorov, G.
AU  - Gorbenko, I.
AU  - Kachorovskii, V.
AU  - Ganichev, S.
PY  - 2020
DA  - 2020//
TI  - Helicity-sensitive plasmonic terahertz interferometer
T2  - Nano Lett.
JO  - Nano Lett.
SP  - 7296
EP  - 7303
VL  - 20
IS  - 10
KW  - graphene
KW  - plasmonic interferometer
KW  - radiation helicity
KW  - terahertz radiation
AB  - 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.
SN  - 1530-6984
UR  - http://www.ncbi.nlm.nih.gov/pubmed/32903004
UR  - https://doi.org/10.1021/acs.nanolett.0c02692
DO  - 10.1021/acs.nanolett.0c02692
N1  - PMID:32903004
ID  - Matyushkin_etal2020
ER  -