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Optical Engineering

Guided modes in asymmetric negative-zero-positive index metamaterial waveguide in the terahertz regime
Author(s): Xiao-Lei Zhao; Cai Yuan; Shi-Lin Xu; Wen-Hua Lv; Jian-Quan Yao
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Paper Abstract

An asymmetric negative-zero-positive index metamaterial (NZPIM) waveguide with two different Dirac points (DPs) operating in the terahertz (THz) regime is proposed. Its propagating characteristics are investigated by using the graphical method. Due to the linear dispersion near the DPs, the asymmetric NZPIM waveguide exhibits unique properties of guided modes, which are different from that in conventional waveguide but similar to that of electron waves in graphene waveguides. It is shown that the guided mode properties can be tuned by adjusting the incident angular frequency. In addition, the properties of surface-guided modes are also discussed. Our work may have potential applications in THz functional devices as well as reference value in investigating the guided modes of electrons in graphene waveguides.

Paper Details

Date Published: 3 April 2014
PDF: 8 pages
Opt. Eng. 53(4) 045102 doi: 10.1117/1.OE.53.4.045102
Published in: Optical Engineering Volume 53, Issue 4
Show Author Affiliations
Xiao-Lei Zhao, Tianjin Univ. (China)
Cai Yuan, Tianjin Univ. (China)
Shi-Lin Xu, Tianjin Univ. (China)
Wen-Hua Lv, Tianjin Univ. (China)
Jian-Quan Yao, Tianjin Univ. (China)

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