Valley Hall nanoscale lasers developed

Topological photonics underpins a promising paradigm for robust light manipulation, as well as smart design of optical devices with improved reliability and advanced functionalities that are governed by the nontrivial band topology. Nanostructures made of high-index dielectric materials with resonant elements and lattice arrangements show special promise for implementation of topological order for light at the nanoscale and optical on-chip applications. High-index dielectrics such as III-V semiconductors that can contain strong optical gain further enhanced by topological field localization form a promising platform for active topological nanophotonics.

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