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14 papers
Interplay of leakage radiation and protection in topological photonic crystal cavities
René Barczyk, Nikhil Parappurath, Sonakshi Arora +3
The introduction of topological concepts to the design of photonic crystal cavities holds great promise for applications in integrated photonics due to the prospect of topological…
Breakdown of spin-to-helicity locking at the nanoscale in topological photonic crystal edge states
Sonakshi Arora, Thomas Bauer, Nikhil Parappurath +3
We measure the local near-field spin in topological edge state waveguides that emulate the quantum spin Hall effect. We reveal a highly structured spin density distribution that is…
Direct quantification of topological protection in symmetry-protected photonic edge states at telecom wavelengths
S. Arora, T. Bauer, R. Barczyk +2
Topological on-chip photonics based on tailored photonic crystals (PhC) that emulate quantum valley Hall effects has recently gained widespread interest due to its promise of robus…
Poynting singularities in the transverse flow-field of random vector waves
M. A. van Gogh, T. Bauer, L. De Angelis +1
In order to utilize the full potential of tailored flows of electromagnetic energy at the nanoscale, we need to understand its general behaviour given by its generic representation…
Multi-twist polarization ribbon topologies in highly-confined optical fields
Thomas Bauer, Peter Banzer, Frédéric Bouchard +6
Electromagnetic plane waves, solutions to Maxwell's equations, are said to be `transverse' in vacuum. Namely, the waves' oscillatory electric and magnetic fields are confined withi…
The magnetic and electric transverse spin density of spatially confined light
Martin Neugebauer, Jörg Eismann, Thomas Bauer +1
When a beam of light is laterally confined, its field distribution can exhibit points where the local magnetic and electric field vectors spin in a plane containing the propagation…