Tunable terahertz omnidirectional photonic gap in one dimensional graphene-based photonic crystals

In this article, we propose a new design of one-dimensional graphene-based photonic crystal (GPC). The first layer of the unit cell of the GPC consists of a dielectric wherein graphene sheets are embedded and the second layer is a dielectric medium. The transmission properties of the GPC are investi...

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Bibliographic Details
Published inOptical and quantum electronics Vol. 47; no. 7; pp. 1627 - 1636
Main Author El-Naggar, Sahar A.
Format Journal Article
LanguageEnglish
Published New York Springer US 01.07.2015
Subjects
Characterization and Evaluation of Materials
Computer Communication Networks
Electrical Engineering
Lasers
Optical Devices
Optics
Photonics
Physics
Physics and Astronomy
Photonic cystals
Terahertz applications
Omnidirectional
Graphene
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Summary:In this article, we propose a new design of one-dimensional graphene-based photonic crystal (GPC). The first layer of the unit cell of the GPC consists of a dielectric wherein graphene sheets are embedded and the second layer is a dielectric medium. The transmission properties of the GPC are investigated using the transfer matrix method. Numerical calculations of the transmittance show that the suggested structure possesses a new type of the photonic band gap in the THz region that is robust for both transverse electric and magnetic polarizations. In addition, the demonstrated gap is independent of the incidence angle. Moreover, we show that the width of the gap can be tuned by the properties of the graphene sheets. The proposed structure works as a perfect stop filter, which completely blocks both polarizations, and may have many other potential applications.
ISSN:0306-8919
1572-817X
DOI:10.1007/s11082-014-0021-1