Graphene-based hyperbolic metamaterial

Author

Othman, Mohamed A. K. ; Guclu, Caner ; Capolino, Filippo

Author_Institution

Dept. of Electr. Eng. & Comput. Sci., Univ. of California, Irvine, Irvine, CA, USA

fYear

2013

fDate

7-13 July 2013

Firstpage

484

Lastpage

485

Abstract

We introduce a graphene-based composite multilayer structure that exhibits hyperbolic-like wavevector dispersion at terahertz and mid-infrared frequencies. The multilayer structure comprises graphene sheets separated by dielectric layers. We formulate the effective permittivity tensor of the multilayer using a simple homogenization scheme. In addition, we employ Bloch theory for evaluating the wavevector dispersion for a propagation mode inside the HM, and show that the homogenization scheme is in good agreement with Bloch theory in a very wide spatial spectrum. We report the tunability of transition from elliptic to hyperbolic iso-frequency wavevector dispersion by varying the chemical potential of graphene sheets.

Keywords

dispersion (wave); electromagnetic metamaterials; graphene; multilayers; permittivity; sheet materials; Bloch theory; HM; dielectric layers; effective permittivity tensor; elliptic iso-frequency wavevector dispersion; graphene sheets; graphene-based composite multilayer structure; graphene-based hyperbolic metamaterial; homogenization scheme; hyperbolic iso-frequency wavevector dispersion; hyperbolic-like wavevector dispersion; mid-infrared frequency; propagation mode; spatial spectrum; terahertz frequency; transition tunability; wavevector dispersion evaluation; Dielectrics; Dispersion; Graphene; Metamaterials; Nonhomogeneous media; Optical surface waves; Permittivity;

fLanguage

English

Publisher

ieee

Conference_Titel

Antennas and Propagation Society International Symposium (APSURSI), 2013 IEEE

Conference_Location

Orlando, FL

ISSN

1522-3965

Print_ISBN

978-1-4673-5315-1

Type

conf

DOI

10.1109/APS.2013.6710903

Filename

6710903