Surface Gap Solitons in Exciton Polariton Condensates

TL;DR

This paper investigates surface gap solitons in exciton-polariton condensates, revealing their existence conditions near interfaces and their stability dependence on pump power and width.

Contribution

It introduces the concept of surface gap solitons in exciton-polariton condensates and analyzes their existence and stability conditions.

Findings

SGSs exist only at low pump power and small width

Increasing pump power or width leads to SGS instability

Surface gap solitons are confined near the interface between different EPC regions

Abstract

A gap soliton is a solitonic state existing inside the band gap of an infinite-periodic exciton-polariton condensate (EPC). The combination of surface states and gap solitons forms the so named surface gap solitons (SGSs). We analyze the existence of SGSs near the interface between uniform and semi-infinite periodic EPCs. We find that SGSs exist only when the system is excited by a pump with low power and small width. As the pump power or width increases, SGSs become unstable.