XXV International Symposium "Nanophysics and Nanoelectronics", Nizhny Novgorod, March 9-12, 2021

Features of the damping and amplification of terahertz plasmon eigenmodes in graphene taking the spatial dispersion into account

O. V. Polishchuk, D. V. Fateev, V. V. Popov

Saratov Branch, Kotel'nikov Institute of Radio-Engineering and Electronics, Russian Academy of Sciences

Abstract: The effect of charge-carrier drift on the plasmon excitation modes (plasmons) in a Dirac electron liquid in graphene with a displaced Fermi level is considered. The dispersion relations for plasmons are obtained using the electromagnetic approach and hydrodynamic description of the electron liquid. Damped and amplified plasmon eigenmodes are studied numerically depending on the relationship of the magnitudes and directions of the direct electrical current and the plasmon phase velocity.

Keywords: terahertz range, plasmon, graphene, charge-carrier drift.

Received: 12.04.2021
Revised: 19.04.2021
Accepted: 19.04.2021

DOI: 10.21883/FTP.2021.10.51432.29

 English version: Semiconductors, 2021, 55:12, 875–878

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