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Actively modulated propagation of electromagnetic wave in hybrid metasurfaces containing graphene

Authors :
Nan Jiameng
Yang Ruisheng
Xu Jing
Fu Quanhong
Zhang Fuli
Fan Yuancheng
Source :
EPJ Applied Metamaterials, Vol 7, p 9 (2020)
Publication Year :
2020
Publisher :
EDP Sciences, 2020.

Abstract

Here we present the actively modulated transportation of electromagnetic wave through hybrid metasurfaces containing graphene. The hybrid metasurfaces are composed of patterned metallic layers of extraordinary transmission and backed with graphene-sandwich layers. With the designed metallic layer with perforated structure, we demonstrated effective modulation on the on-resonance transmission amplitude by increasing the bias voltage from 0 to 4 V to electrically tune the Fermi level as well as the sheet resistance of the graphene-sandwich structure. We also found that the modulation depth can be further improved by properly designing the perforated metallic structure. By change the geometry from cut-wire structure to the “butterfly”-like pattern we preliminarily achieved 19.2% improvement on the on-resonance transmission modulation. The measured transmittances of the active metasurfaces show good agreement with the numerical simulations with fitted graphene sheet resistances. The hybrid metasurfaces presented in this work may be deployed in a wide range of applications based on active electromagnetic or optical modulations.

Details

Language :
English
ISSN :
22722394
Volume :
7
Database :
Directory of Open Access Journals
Journal :
EPJ Applied Metamaterials
Publication Type :
Academic Journal
Accession number :
edsdoj.2ea26b01be284a1fb279a435c836f93c
Document Type :
article
Full Text :
https://doi.org/10.1051/epjam/2020011