Resonance absorption of terahertz radiation in nanoperforated graphene


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Abstract

Recent measurements of the conductivity of nanoperforated graphene are interpreted in terms of edges states existing near the edge of each nanohole. The perimetric quantization of edge states should result in the formation of a quasi-equidistant ladder of quasistationary energy levels. Dirac fermions filling this ladder rotate about each nanohole in the direction determined by the valley index. It is shown that the irradiation of this system by circularly polarized terahertz radiation leads to a resonance in absorption in one of the valleys. The magnitude of absorption at the resonance frequency can be controlled by means of gate voltage.

About the authors

V. V. Enaldiev

Kotel’nikov Institute of Radio Engineering and Electronics

Author for correspondence.
Email: vova.enaldiev@gmail.com
Russian Federation, Moscow, 125009

V. A. Volkov

Kotel’nikov Institute of Radio Engineering and Electronics; Moscow Institute of Physics and Technology (State University)

Email: vova.enaldiev@gmail.com
Russian Federation, Moscow, 125009; Dolgoprudnyi, Moscow region, 141700

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