Matyushkin, Yakov and Danilov, Sergey and Moskotin, Maxim and Belosevich, Vsevolod and Kaurova, Natalia and Rybin, Maxim and Obraztsova, Elena D. and Fedorov, Georgy and Gorbenko, Ilya and Kachorovskii, Valentin and Ganichev, Sergey D. (2020) Helicity-Sensitive Plasmonic Terahertz Interferometer. NANO LETTERS, 20 (10). pp. 7296-7303. ISSN 1530-6984, 1530-6992
Full text not available from this repository. (Request a copy)Abstract
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.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | ; plasmonic interferometer; terahertz radiation; radiation helicity; graphene |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Experimental and Applied Physics > Professor Ganichev > Group Sergey Ganichev |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 09 Mar 2021 06:21 |
| Last Modified: | 09 Mar 2021 06:21 |
| URI: | https://pred.uni-regensburg.de/id/eprint/43563 |
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