Measuring Optical Spin in the near Field of Photonic Topological Edge States
Sonakshi Arora (Kavli institute of nanoscience Delft, TU Delft - QN/Kuipers Lab)
Thomas Bauer (TU Delft - QN/Kuipers Lab, Kavli institute of nanoscience Delft)
Rene Barczyk (AMOLF Institute for Atomic and Molecular Physics)
Ewold Verhagen (AMOLF Institute for Atomic and Molecular Physics)
Kobus Kuipers (Kavli institute of nanoscience Delft, TU Delft - QN/Quantum Nanoscience)
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Abstract
With phase-and polarization-resolving near-field optical microscopy we directly visualize the electromagnetic vector field in topological photonic crystals featuring the optical quantum spin Hall effect. We reveal that the local optical spin of spin-protected edge states is highly structured.
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