Topologically Protected Parametric Wavelength Conversion in a Valley Hall Insulator
Byoung‐Uk Sohn,
Ju Won Choi,
George F. R. Chen
et al.
Abstract:Nonlinear phenomena are investigated in a topological photonic valley Hall insulator (VHI) using a Kagome system designed to have localized topological boundary state (TBS) at telecommunications wavelengths. Valley Hall topologically protected nonlinear phenomena are demonstrated. Similar transmission properties and parametric wavelength conversion of up to −12 dB are experimentally achieved using sub‐milliwatt average powers in a zigzag interface without back‐scattering, compared with a straight interface. Fu… Show more
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