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Gapless unidirectional photonic transport using all-dielectric kagome lattices

Wong, Stephan, Saba, Matthias, Hess, Ortwin and Oh, Sang Soon 2020. Gapless unidirectional photonic transport using all-dielectric kagome lattices. Physical Review Research 2 (1) , 012011(R). 10.1103/PhysRevResearch.2.012011

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Abstract

Photonic topological insulators are a promising photonic platform due to the possibility of unidirectional edge states with insensitivity to bending, fabrication imperfections or environmental fluctuation. Here we demonstrate highly efficient unidirectional photonic edge mode propagation facilitated by an optical analogue of the quantum valley Hall effect. With an all-dielectric kagome lattice design, we demonstrate broadband suppressed reflection in the presence of sharp corners and further show negligible vertical losses in a semiconductor-based device at telecommunication wavelengths.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Physics and Astronomy
Publisher: American Physical Society
ISSN: 2643-1564
Date of First Compliant Deposit: 18 December 2019
Date of Acceptance: 6 December 2019
Last Modified: 20 Jan 2020 11:21
URI: http://orca-mwe.cf.ac.uk/id/eprint/127635

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