Volume 116, Number 4, November 2016
|Number of page(s)||6|
|Section||Electromagnetism, Optics, Acoustics, Heat Transfer, Classical Mechanics, and Fluid Dynamics|
|Published online||03 January 2017|
Robust waveguide against surface perturbations due to band inversion in two kinds of single-negative metamaterials
1 College of Physics and Information Engineering, Shanxi Normal University - Linfen 041004, China
2 Key Laboratory of Advanced Micro-structure Materials, MOE, Department of Physics, Tongji University Shanghai 200092, China
Received: 9 November 2016
Accepted: 15 December 2016
We experimentally study the guided wave along the interface between ε-negative (ENG) material and μ-negative (MNG) material when the interface is distorted. It is demonstrated that the guided mode is robust against various interface perturbations, owing to the band inversion between ENG and MNG materials. For comparison, the guided modes in double-positive material sandwiched by two MNG materials are also investigated under the same interface perturbations. Without band inversion, the guided modes in the sandwich waveguide are strongly affected by the interface distortions. Numerical simulations agree well with the experimental results.
PACS: 41.20.Jb – Electromagnetic wave propagation; radiowave propagation / 42.70.Qs – Photonic bandgap materials
© EPLA, 2016
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