Topological edge and corner states in coupled wave lattices in nonlinear polariton condensates.

ABSTRACT: Topological states have been widely investigated in different types of systems and lattices. In the present work, we report on topological edge states in double-wave (DW) chains, which can be described by a generalized Aubry-André-Harper (AAH) model. For the specific system of a driven-dissipative exciton polariton system we show that in such potential chains, different types of edge states can form. For resonant optical excitation, we further find that the optical nonlinearity leads to a multistability of different edge states. This includes topologically protected edge states evolved directly from individual linear eigenstates as well as additional edge states that originate from nonlinearity-induced localization of bulk states. Extending the system into two dimensions (2D) by stacking h

SUBMITTER: Schneider T 

PROVIDER: S-EPMC11501762 | biostudies-literature | 2024 Feb

REPOSITORIES: biostudies-literature