107 citations · 130 across the 4 of their papers we have counts for
4 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 Observation of Topological Edge States in Silicon Photonic Crystals: Spin, Dispersion, and Chiral Routing
Nikhil Parappurath, Filippo Alpeggiani, L. Kuipers +1
Topological protection in photonics offers new prospects for guiding and manipulating classical and quantum information. The mechanism of spin-orbit coupling promises the emergence…
Quasinormal-mode expansion of the scattering matrix
Filippo Alpeggiani, Nikhil Parappurath, Ewold Verhagen +1
It is well known that the quasinormal modes (or resonant states) of photonic structures can be associated with the poles of the scattering matrix of the system in the complex-frequ…