Certain lattice wave systems in translationally invariant settings have one or more spectral
bands that are strictly flat or independent of momentum in the tight binding approximation …

Flat-band systems have attracted considerable interest in different branches of physics in the
past decades, providing a flexible platform for studying fundamental phenomena associated …

Geometry, whether on the atomic or nanoscale, is a key factor for the electronic band
structure of materials. Some specific geometries give rise to novel and potentially useful …

Plasmonic nanoarrays which support collective surface lattice resonances (SLRs) have
become an exciting frontier in plasmonics. Compared with the localized surface-plasmon …

We study exciton polaritons in a two-dimensional Lieb lattice of micropillars. The energy
spectrum of the system features two flat bands formed from S and P x, y photonic orbitals …

Flatband systems typically host “compact localized states”(CLS) due to destructive
interference and macroscopic degeneracy of Bloch wave functions associated with a …

We propose a class of photonic Floquet topological insulators based on staggered helical
lattices and an efficient numerical method for calculating their Floquet band structure. The …

Flatbands play an important role in correlated quantum matter and have promising
applications in photonic lattices. Synthetic magnetic fields and destructive interference in …

For centuries, singularities in wave fields have been a mainstay of interest in multiple areas
of physics, ranging from plasma physics, fluid dynamics and atmospheric physics to optics …

The band structure and electronic properties of a material are defined by the sort of
elements, the atomic registry in the crystal, the dimensions, the presence of spin–orbit …