Document Type

Article

Publication Date

9-3-2018

Publication Title

Optics Express

ISSN

1094-4087

Volume

26

Issue

18

First Page

23705

Last Page

23713

DOI

https://doi.org/10.1364/OE.26.023705

PubMed ID

30184867

Abstract

We examine the Goos-Hänchen (GH) effect for a Gaussian beam impinging on the surface of silicene whose topological phase transitions can be modulated by external electric field and/or irradiating circular polarized light. It is shown that both the spatial and angular shifts in GH effect present a sharp jump due to the topological phase transitions. The transitional GH effect can be attributed to transitional optical conductivity, which relates to Berry curvature and Chern numbers. These results can be extensively extended to other two-dimensional atomic crystals in graphene family. We believe that the transitional GH effect may offer a possible way to determine the Berry curvature, Chern numbers, and topological phase transition by a direct optical measurement.

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