Guided modes in asymmetric negative-zero-positive index metamaterial waveguide in the terahertz regime

Xiao-Lei Zhao; Cai Yuan; Shi-Lin Xu; Wen-Hua Lv; Jian-Quan Yao

doi:10.1117/1.OE.53.4.045102

3 April 2014 Guided modes in asymmetric negative-zero-positive index metamaterial waveguide in the terahertz regime

Xiao-Lei Zhao, Cai Yuan, Shi-Lin Xu, Wen-Hua Lv, Jian-Quan Yao

Author Affiliations +

Optical Engineering, Vol. 53, Issue 4, 045102 (April 2014). https://doi.org/10.1117/1.OE.53.4.045102

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.

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Xiao-Lei Zhao, Cai Yuan, Shi-Lin Xu, Wen-Hua Lv, and Jian-Quan Yao "Guided modes in asymmetric negative-zero-positive index metamaterial waveguide in the terahertz regime," Optical Engineering 53(4), 045102 (3 April 2014). https://doi.org/10.1117/1.OE.53.4.045102

Published: 3 April 2014

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