Direct quantification of robustness in topologically-protected photonic edge states at telecom wavelengths

Sonakshi Arora; Thomas A. Bauer; René Barczyk; Ewold Verhagen; Laurens K. Kuipers

doi:10.1117/12.2594527

1 August 2021 Direct quantification of robustness in topologically-protected photonic edge states at telecom wavelengths

Sonakshi Arora, Thomas A. Bauer, René Barczyk, Ewold Verhagen, Laurens K. Kuipers

Author Affiliations +

Proceedings Volume 11796, Active Photonic Platforms XIII; 117961F (2021) https://doi.org/10.1117/12.2594527
Event: SPIE Nanoscience + Engineering, 2021, San Diego, California, United States

Abstract

Topologically tailored photonic crystals offer robust transport of optical states in quantum and classical systems. However, quantifying the robustness of edge states in topologically protected PhCs has remained elusive. In our recent work, we report a rigorous quantitative evaluation of topological photonic edge eigenstates, emulating the quantum valley Hall effect (VPC), and analyze their transport properties in the telecom wavelength range using a phase-resolved near-field optical microscope. Our results demonstrate that the backscattering energy ratio for the VPC is two orders of magnitude smaller compared to that in a conventional W1 waveguide. Such an evaluation opens a pathway for creating quantum photonic networks that can achieve secure and robust communications.

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Sonakshi Arora, Thomas A. Bauer, René Barczyk, Ewold Verhagen, and Laurens K. Kuipers "Direct quantification of robustness in topologically-protected photonic edge states at telecom wavelengths", Proc. SPIE 11796, Active Photonic Platforms XIII, 117961F (1 August 2021); https://doi.org/10.1117/12.2594527

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