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Group Theoretical Route to Deterministic Weyl Points in Chiral Photonic Lattices.


Type

Article

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Authors

Saba, Matthias 
Hamm, Joachim M 
Baumberg, Jeremy J 
Hess, Ortwin 

Abstract

Topological phases derived from point degeneracies in photonic band structures show intriguing and unique behavior. Previously identified band degeneracies are based on accidental degeneracies and subject to engineering on a case-by-case basis. Here we show that deterministic pseudo Weyl points with nontrivial topology and hyperconic dispersion exist at the Brillouin zone center of chiral cubic symmetries. This conceivably allows realization of topologically protected frequency isolated surface bands in 3D and n=0 properties as demonstrated for a nanoplasmonic system and a photonic crystal.

Description

Keywords

physics.optics, physics.optics

Journal Title

Phys Rev Lett

Conference Name

Journal ISSN

0031-9007
1079-7114

Volume Title

119

Publisher

American Physical Society (APS)
Sponsorship
European Research Council (320503)
Engineering and Physical Sciences Research Council (EP/L027151/1)
Engineering and Physical Sciences Research Council (EP/G060649/1)