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Experimental Demonstration of Single-mode Topological Valley-Hall Lasing Controlled by the Degree of Asymmetry

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Abstract

We demonstrate a single-mode valley-Hall laser at telecommunication wavelength. The degree of asymmetry in a honeycomb photonic crystal governs light confinement regimes in the valley-Hall cavity and enables efficient single-mode operation despite multiple modes.

© 2020 The Author(s)

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