Topological Anderson insulator in disordered photonic crystals

Topological Anderson insulator in disordered photonic crystals

Recent studies have revealed the counterintuitive possibility that increasing disorder can turn a topologically trivial insulator into a nontrivial insulator, called a topological Anderson insulator (TAI). Here, we propose and experimentally demonstrate a photonic TAI in a two-dimensional disordered...

Full description

Bibliographic Details
Main Authors: Liu, Gui-Geng, Yang, Yihao, Ren, Xin, Xue, Haoran, Lin, Xiao, Hu, Yuan-Hang, Sun, Hong-xiang, Peng, Bo, Zhou, Peiheng, Chong, Yidong, Zhang, Baile
Other Authors: School of Physical and Mathematical Sciences
Format: Journal Article
Language:English
Published: 2020
Subjects:
Science::Physics
Anderson Insulator
Photonic Crystals
Online Access:https://hdl.handle.net/10356/145168
Description
Summary:Recent studies have revealed the counterintuitive possibility that increasing disorder can turn a topologically trivial insulator into a nontrivial insulator, called a topological Anderson insulator (TAI). Here, we propose and experimentally demonstrate a photonic TAI in a two-dimensional disordered gyromagnetic photonic crystal in the microwave regime. We directly observe the disorder-induced topological phase transition from a trivial insulator to a TAI with robust chiral edge states. We also demonstrate topological heterostructures that host edge states at interfaces between domains with different disorder parameters.

Similar Items