Direct observation of topological edge states in silicon photonic crystals
Nikhil Parappurath (AMOLF Institute for Atomic and Molecular Physics)
Filippo Alpeggiani (TU Delft - QN/Kuipers Lab, Kavli institute of nanoscience Delft)
L. Kuipers (TU Delft - QN/Quantum Nanoscience, Kavli institute of nanoscience Delft)
Ewold Verhagen (AMOLF Institute for Atomic and Molecular Physics)
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Abstract
We directly observe the states of topological photonic crystals at telecom wavelengths. Using the states’ intrinsic radiation, we measure dispersion, loss, pseudospin, and spin-spin scattering. We image spin-selective unidirectional propagation around sharp corners and junctions.
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