Optical signature of topological insulators

Ming Che Chang*, Min Fong Yang

*此作品的通信作者

研究成果: 雜誌貢獻期刊論文同行評審

74 引文 斯高帕斯(Scopus)

摘要

The axion coupling in topological insulators couples electric polarization with magnetic field, and magnetization with electric field. As a result, the usual laws of electromagnetic wave propagation are modified. We report on the Fresnel formula for the reflection of electromagnetic wave at the interface of materials with different axion couplings. The Brewster angle and the Goos-Hänchen effect are also studied. We find that, because of the axion coupling, in order to realize the Brewster-angle condition, the incident polarization should be rotated away from the plane of incidence. The maximum angle of rotation is π/4 when both materials have nearly the same refraction indices. This offers a convenient way to determine the axion angle by optical measurement.

原文英語
文章編號113304
期刊Physical Review B - Condensed Matter and Materials Physics
80
發行號11
DOIs
出版狀態已發佈 - 2009 九月 16

ASJC Scopus subject areas

  • 電子、光磁材料
  • 凝聚態物理學

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