Voltage-controlled enhancement of optical absorption in a graphene monolayer with a one-dimensional photonic crystal

Voltage-controlled enhancement of optical absorption in a graphene monolayer with a... The structure of a one-dimensional photonic crystal (1D-PhC) with a graphene-based defect is proposed and investigated to enhance the optical response of graphene in the visible to near-infrared (NIR) wavelength region. An electro-optical (EO) tuning material lithium niobate (LiNbO3, LN) is selected as the spacer layer with an external voltage applied on it. By means of the transfer-matrix method (TMM), the dependence of the absorption characteristics on the incident angle and period numbers is analyzed. The possibility of the resonant wavelength being tunable via the external voltage and thickness of the LN layer is also discussed. It is shown that nearly perfect absorption can be achieved by a certain choice of the period numbers of the 1D-PhC surrounding the defect layer at a specific incidence. The linear relation between the peak wavelength and the applied external voltage is also demonstrated, and it is possible to control the position and number of the resonant wavelengths by varying the voltage and thickness of the LN defect layer. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Applied Physics B Springer Journals

Voltage-controlled enhancement of optical absorption in a graphene monolayer with a one-dimensional photonic crystal

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Publisher
Springer Berlin Heidelberg
Copyright
Copyright © 2017 by Springer-Verlag GmbH Germany
Subject
Physics; Physics, general; Physical Chemistry; Optics, Lasers, Photonics, Optical Devices; Quantum Optics; Engineering, general
ISSN
0946-2171
eISSN
1432-0649
D.O.I.
10.1007/s00340-017-6810-z
Publisher site
See Article on Publisher Site

Abstract

The structure of a one-dimensional photonic crystal (1D-PhC) with a graphene-based defect is proposed and investigated to enhance the optical response of graphene in the visible to near-infrared (NIR) wavelength region. An electro-optical (EO) tuning material lithium niobate (LiNbO3, LN) is selected as the spacer layer with an external voltage applied on it. By means of the transfer-matrix method (TMM), the dependence of the absorption characteristics on the incident angle and period numbers is analyzed. The possibility of the resonant wavelength being tunable via the external voltage and thickness of the LN layer is also discussed. It is shown that nearly perfect absorption can be achieved by a certain choice of the period numbers of the 1D-PhC surrounding the defect layer at a specific incidence. The linear relation between the peak wavelength and the applied external voltage is also demonstrated, and it is possible to control the position and number of the resonant wavelengths by varying the voltage and thickness of the LN defect layer.

Journal

Applied Physics BSpringer Journals

Published: Aug 22, 2017

References

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