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Flexibly designed spoof surface plasmon waveguide array for topological zero-mode realization
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DOI：10.1364/OE.26.031636.png)
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Abstract
En 中文
We propose a flexibly designed photonic system based on ultrathin corrugated metallic H-bar waveguide that supports spoof surface plasmon polariton (SPP) at microwave frequencies. Five designs were presented, in order to demonstrate flexibility according to varying height, period, core width, rotation, and shifting on the H-bar unit of the waveguide. The propagation constant between two hybrid designs of period and height structure was then shown in order to study the coupling effect. Next, we constructed a coupled waveguide array that followed the Su-Schrieffer-Heeger (SSH) model. This model was constructed by a hybrid design with the identical propagation constant of each waveguide, except it had dimerized spacing. The propagation feature of topological zero mode was then observed as theoretically expected in the dimerized array. Our proposed spoof SPP waveguide array has great flexibility to be used as a powerful experiment platform, particularly in photonic simulation of the quantum or topological phenomena described by Schrodinger equation in condensed matters. (C) 2018 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
Keywords:
BROAD-BAND
ULTRATHIN
METAMATERIAL