All-Si valley-Hall photonic topological insulator

An all-Si photonic structure emulating the quantum-valley-Hall effect is proposed. We show that it acts as a photonic topological insulator (PTI), and that an interface between two such PTIs can support edge states that are free from scattering. The conservation of the valley degree of freedom enabl...

Full description

Saved in:
Bibliographic Details
Published inNew journal of physics Vol. 18; no. 2; pp. 25012 - 25020
Main Authors Ma, Tzuhsuan, Shvets, Gennady
Format Journal Article
LanguageEnglish
Published Bristol IOP Publishing 10.02.2016
Subjects
all-dielectric
Crosstalk
Edge waves
integrated photonics
photonic graphene
photonic topological insulator
Photonics
Physics
Quantum Hall effect
Si photonics
Topological insulators
topological photonics
valleytronics
Online AccessGet full text

Cover

More Information
Summary:An all-Si photonic structure emulating the quantum-valley-Hall effect is proposed. We show that it acts as a photonic topological insulator (PTI), and that an interface between two such PTIs can support edge states that are free from scattering. The conservation of the valley degree of freedom enables efficient in- and out-coupling of light between the free space and the photonic structure. The topological protection of the edge waves can be utilized for designing arrays of resonant time-delay photonic cavities that do not suffer from reflections and cross-talk.
Bibliography:NJP-103925.R2
ISSN:1367-2630
1367-2630
DOI:10.1088/1367-2630/18/2/025012