A group theoretical route to deterministic Weyl points in chiral photonic lattices

Abstract

Classical topological phases derived from point degeneracies in photonic bandstructures show intriguing and unique behaviour. Previously identified exceptional points are based on accidental degeneracies and subject to engineering on a case-by-case basis. Here we show that symmetry induced (deterministic) pseudo Weyl points with non-trivial topology and hyper-conic dispersion exist at the centre of the Brillouin zone of chiral cubic systems. We establish the physical implications by means of a $P{2}_{1}3$ sphere packing, realised as a nano plasmonic system and a photonic crystal.

References in corpus (4)

• Topological Photonics
• Analogs of quantum Hall effect edge states in photonic crystals
• Dirac-like plasmons in honeycomb lattices of metallic nanoparticles
• Dirac Spectra and Edge States in Honeycomb Plasmonic Lattices

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• Spin-orbit interactions of transverse sound
• The Nature of Topological Protection in Spin and Valley Hall Insulators
• Discovery of a maximally charged Weyl point
• Observation of Single Pair of Type-III Weyl Points in Sonic Crystals
• Unconventional bound states in the continuum from metamaterial induced electron-acoustic plasma waves
• Realization of Photonic Charge-2 Dirac Point by Engineering Super-modes in Topological Superlattices