Open AccessNonreciprocal Goos-Hänchen shift by topological edge states of a magnetic photonic crystal
Author(s) -
H.K. Ma,
Chao Ju,
Xiang Xi,
RuiXin Wu
Publication year - 2020
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.394286
Subject(s) - photonic crystal , optics , magnetic field , physics , slow light , ray , negative refraction , blueshift , condensed matter physics , square lattice , refractive index , quantum mechanics , ising model , photoluminescence
We demonstrate that a topological edge state can enhance the Goos-Hänchen (GH) shift on the interface of a magnetic photonic crystal (MPC) fabricated by ferrite rings in a square lattice. The GH shift is nonreciprocal because of the time reversal symmetry breaking, and the shift is negative, which is associated with the incident angles and direction of bias DC magnetic field. In particular, the nonreciprocal GH shift presents at normal incidence, and is further verified by experiments. The nonreciprocal negative GH shifts provide a new way to control the flow of light, which could be applied to sensing and even the slow light waveguide to trap the light.