Academic Journal
Spin-valley locked topological edge states in a staggered chiral photonic crystal
| Title: | Spin-valley locked topological edge states in a staggered chiral photonic crystal |
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| Authors: | Minkyung Kim, Yeseul Kim, Junsuk Rho |
| Source: | New Journal of Physics, Vol 22, Iss 11, p 113022 (2020) |
| Publisher Information: | IOP Publishing, 2020. |
| Publication Year: | 2020 |
| Collection: | LCC:Science LCC:Physics |
| Subject Terms: | chiral photonic crystal, topological edge state, pseudo-spin, spin-valley, Science, Physics, QC1-999 |
| More Details: | Engineering pseudo-spin and valley degrees of freedom using quantum spin Hall and valley Hall effects has opened up remarkable possibilities for highly efficient and robust signal transport in time-reversal invariant photonic systems. Here we present a spin-valley locked photonic crystal that has distinct signs of chirality of sublattices in a honeycomb unit cell. We show that the photonic crystal has an insulating bulk dispersion and sublattice-dependent spin-valley coupled gapless edge states by exploiting a coupled dipole method and demonstrate valley-selective propagation by controlling spin state of an external dipole source. The interplay between spin, valley and sublattice shows a judicious way for one-way photon transport by using multiple degrees of freedom. |
| Document Type: | article |
| File Description: | electronic resource |
| Language: | English |
| ISSN: | 1367-2630 |
| Relation: | https://doaj.org/toc/1367-2630 |
| DOI: | 10.1088/1367-2630/abc8ae |
| Access URL: | https://doaj.org/article/e08baa53cdcb4bc6bd16a2d00000ad07 |
| Accession Number: | edsdoj.08baa53cdcb4bc6bd16a2d00000ad07 |
| Database: | Directory of Open Access Journals |
| ISSN: | 13672630 |
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| DOI: | 10.1088/1367-2630/abc8ae |
| Published in: | New Journal of Physics |
| Language: | English |