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Room-temperature lasing from nanophotonic topological cavities.

ABSTRACT: The study of topological phases of light underpins a promising paradigm for engineering disorder-immune compact photonic devices with unusual properties. Combined with an optical gain, topological photonic structures provide a novel platform for micro- and nanoscale lasers, which could benefit from nontrivial band topology and spatially localized gap states. Here, we propose and demonstrate experimentally active nanophotonic topological cavities incorporating III-V semiconductor quantum wells as a gain medium in the structure. We observe room-temperature lasing with a narrow spectrum, high coherence, and threshold behaviour. The emitted beam hosts a singularity encoded by a triade cavity mode that resides in the bandgap of two interfaced valley-Hall periodic photonic lattices with opposite parity breaking. Our findings make a step towards topologically controlled ultrasmall light sources with nontrivial radiation characteristics.

SUBMITTER: Smirnova D

PROVIDER: S-EPMC7371636 | biostudies-literature | 2020

REPOSITORIES: biostudies-literature

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Room-temperature lasing from nanophotonic topological cavities.

Smirnova Daria D Tripathi Aditya A Kruk Sergey S Hwang Min-Soo MS Kim Ha-Reem HR Park Hong-Gyu HG Kivshar Yuri Y

Light, science & applications 20200720

The study of topological phases of light underpins a promising paradigm for engineering disorder-immune compact photonic devices with unusual properties. Combined with an optical gain, topological photonic structures provide a novel platform for micro- and nanoscale lasers, which could benefit from nontrivial band topology and spatially localized gap states. Here, we propose and demonstrate experimentally active nanophotonic topological cavities incorporating III-V semiconductor quantum wells as ...[more]

PMID: 32704360

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