Non-Hermitian topological end-mode lasing in polariton systems

Abstract

This paper studies the existence of non-Hermitian topologically protected end states and end-mode lasing in a one-dimensional exciton-polariton condensate lattice, where the topological transition is driven by spatial modulation of the external incoherent pump intensity. The authors find that such transitions arise due to enforced exceptional points which can be predicted directly from the bulk Bloch wave functions, allowing to establish a new type of bulk-boundary correspondence for non-Hermitian systems.

Topics & Concepts