Open Access System for Information Sharing

Login Library

 

Article
Cited 7 time in webofscience Cited 9 time in scopus
Metadata Downloads

Three-dimensional photonic topological insulator without spin-orbit coupling SCIE SCOPUS

Title
Three-dimensional photonic topological insulator without spin-orbit coupling
Authors
Kim MinkyungWang ZihaoYang YihaoTeo Hau TianRho JunsukZhang Baile
Date Issued
2022-06
Publisher
Nature Publishing Group
Abstract
Spin–orbit coupling, a fundamental mechanism underlying topological insulators, has been introduced to construct the latter’s photonic analogs, or photonic topological insulators (PTIs). However, the intrinsic lack of electronic spin in photonic systems leads to various imperfections in emulating the behaviors of topological insulators. For example, in the recently demonstrated three-dimensional (3D) PTI, the topological surface states emerge, not on the surface of a single crystal as in a 3D topological insulator, but along an internal domain wall between two PTIs. Here, by fully abolishing spin–orbit coupling, we design and demonstrate a 3D PTI whose topological surface states are self-guided on its surface, without extra confinement by another PTI or any other cladding. The topological phase follows the original Fu’s model for the topological crystalline insulator without spin–orbit coupling. Unlike conventional linear Dirac cones, a unique quadratic dispersion of topological surface states is directly observed with microwave measurement. Our work opens routes to the topological manipulation of photons at the outer surface of photonic bandgap materials.
URI
https://oasis.postech.ac.kr/handle/2014.oak/112917
DOI
10.1038/s41467-022-30909-0
ISSN
2041-1723
Article Type
Article
Citation
Nature Communications, vol. 13, no. 1, 2022-06
Files in This Item:
There are no files associated with this item.

qr_code

  • mendeley

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

Related Researcher

Researcher

노준석RHO, JUNSUK
Dept of Mechanical Enginrg
Read more

Views & Downloads

Browse