Direct quantification of topological protection in symmetry-protected photonic edge states at telecom wavelengths
Sonakshi Arora (TU Delft - QN/Kuipers Lab, Kavli institute of nanoscience Delft)
Thomas Bauer (Kavli institute of nanoscience Delft, TU Delft - QN/Kuipers Lab)
Rene Barczyk (AMOLF Institute for Atomic and Molecular Physics)
Ewold Verhagen (AMOLF Institute for Atomic and Molecular Physics)
Kobus Kuipers (TU Delft - QN/Quantum Nanoscience, Kavli institute of nanoscience Delft)
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Abstract
Experimental characterization of the electromagnetic vector field in topological photonic crystals featuring the photonic quantum valley Hall effect, using phase-resolving near-field optical microscopy, reveals two orders of magnitude higher robustness compared to a conventional waveguide.
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