Multiple One-Way Edge States From Reciprocal Continuous Media

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journal

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Original languageEnglish
Article number064014
Journal / PublicationPhysical Review Applied
Volume12
Issue number6
Online published5 Dec 2019
Publication statusPublished - Dec 2019

Abstract

Topological one-way edge states promise robust information transport through the notion of photonic crystals. For further applications of edge-state circuits and devices, a high gap Chern number, C-g, is required. Contrary to previous realizations using gyrotropic photonic crystals, we show how vertical bar C-g vertical bar > 1 can be obtained by gapping multiple Dirac cones, which can surprisingly occur in a reciprocal continuous medium with limited degrees of freedom. A maximum of four one-way edge states is allowed on a single interface between two reciprocal continuous media. One-way signal combiners and splitters are designed with exact control on the branching and transmission efficiencies as immediate applications. Our theoretical investigations will be useful for constructing edge-state devices with multiplexing and demultiplexing capability.

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  • WEYL POINTS

Citation Format(s)

Multiple One-Way Edge States From Reciprocal Continuous Media. / Xu, Jinying; Liu, Yineng; Chan, K. S.; Li, Jensen.

In: Physical Review Applied, Vol. 12, No. 6, 064014, 12.2019.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journal