Topological Protection in Radiative Photonic Crystal Cavities

Conference paper (2022)

Authors

S. Arora QN/Kuipers Lab - AS , Kavli institute of nanoscience Delft
T.A. Bauer QN/Kuipers Lab - AS , Kavli institute of nanoscience Delft
L. Kuipers Kavli institute of nanoscience Delft, QN/Quantum Nanoscience
Research Group
QN/Kuipers Lab (AS) (TU Delft)
Copyright: © 2022 R.T. Barczyk, N. Parappurath, S. Arora, T.A. Bauer, L. Kuipers, E. Verhagen
DOI: https://doi.org/10.1109/Metamaterials54993.2022.9920849
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Published Date

2022

Language

English

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Faculty

Applied Sciences

Department

QN/Quantum Nanoscience

Research Group

QN/Kuipers Lab

Abstract

We study the signatures of topological light confinement in the leakage radiation of two-dimensional topological photonic crystal cavities that feature the quantum spin Hall effect at telecom wavelengths. The mode profiles in real and momentum space are retrieved using far field imaging and Fourier spectropolarimetry. We examine the scaling behavior of mode spectra, observe band-inversion-induced confinement, and demonstrate hallmarks of topological protection in the loss rates, which are largely unaffected by cavity shape and size.

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