This article is cited in 2 papers

XXIII International symposium ''Nanophysics and Nanoelectronics'', Nizhny Novgorod, March 11–14, 2019

On the amplification of terahertz radiation by high-$Q$ resonant plasmons in a periodic graphene bilayer under plasmon-mode anticrossing

O. V. Polishchuk^a, D. V. Fateev^ab, V. V. Popov<sup>a

a</sup> Saratov Branch, Kotel'nikov Institute of Radio-Engineering and Electronics, Russian Academy of Sciences
^b Saratov State University

Abstract: The spectrum of amplification of terahertz radiation in a structured active graphene bilayer consisting of two identical periodic graphene microribbon arrays separated by a thin dielectric barrier layer is theoretically investigated. The system supports optical and acoustic plasmon modes. The resonant frequencies of the optical and acoustic modes change oppositely with the dielectric-layer thickness, which allows plasmon-mode anticrossing. It is shown that the investigated graphene structure is characterized by a strong plasmon response and giant terahertz-radiation amplification at plasma resonance frequencies in the vicinity of the anticrossing between the optical and acoustic plasmon modes at room temperature.

Keywords: terahertz radiation, plasmon, graphene, plasmon-mode anticrossing.

Received: 24.04.2019
Revised: 29.04.2019
Accepted: 29.04.2019

DOI: 10.21883/FTP.2019.09.48131.14

 English version: Semiconductors, 2019, 53:9, 1211–1216

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