Electrically modulating and switching infrared absorption of monolayer graphene in metamaterials

Electrically modulating and switching the light absorption properties of monolayer graphene in near-infrared region has potentials in optoelectronic devices (e.g., photodetectors) and optical communication systems (e.g., modulators). In this work, we demonstrate numerically a broadband near-infrared...

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Bibliographic Details
Published in:Carbon (New York) 2020-06, Vol.162, p.187-194
Main Authors: Chen, Jing, Chen, Siyu, Gu, Ping, Yan, Zhendong, Tang, Chaojun, Xu, Zhijun, Liu, Bo, Liu, Zhengqi
Format: Article
Language:English
Subjects:
Absorption modulation
Broadband
Communications systems
Electromagnetic absorption
Graphene
Graphite
Infrared absorption
Magnetic dipoles
Magnetic fields
Magnetic resonance
Metamaterials
Modulators
Monolayers
Near infrared radiation
Optical communication
Optical properties
Optoelectronic devices
Resonance
Studies
Switching
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Summary:Electrically modulating and switching the light absorption properties of monolayer graphene in near-infrared region has potentials in optoelectronic devices (e.g., photodetectors) and optical communication systems (e.g., modulators). In this work, we demonstrate numerically a broadband near-infrared absorption enhancement of monolayer graphene, due to the magnetic dipole resonance in metamaterials. The broadband light absorption in monolayer graphene can be largely modulated to realize an electrically switchable effect, via bias voltage for the interband transition of graphene to be near the magnetic dipole resonance. The absorption modulation depth is able to vary quickly from almost zero to nearly 100% in a very narrow wavelength range around the interband transition. Electrically modulating and switching the light absorption properties of monolayer graphene in near-infrared region has potentials in optoelectronic devices (e.g., photodetectors) and optical communication systems (e.g., modulators). In this work, we firstly demonstrate numerically a broadband near-infrared absorption enhancement of monolayer graphene, due to the magnetic dipole resonance in metamaterials. Then, we show that the broadband light absorption in monolayer graphene can be largely modulated to realize an electrically switchable effect, via bias voltage for the interband transition of graphene to be near the magnetic dipole resonance. The absorption modulation depth is able to vary quickly from almost zero to nearly 100% in a very narrow wavelength range around the interband transition. [Display omitted]
ISSN:0008-6223
1873-3891
DOI:10.1016/j.carbon.2020.02.032