Resonant edge-site pumping of polaritonic Su-Schrieffer-Heeger lattices

TL;DR

This paper theoretically explores how resonant edge-site pumping influences topological states in exciton-polariton Su-Schrieffer-Heeger chains, revealing distinct occupation behaviors in different topological phases.

Contribution

It introduces a semi-classical model for analyzing occupation dynamics in optically pumped topological polariton lattices with phase-controlled topological states.

Findings

Topological states can be controlled via laser phase adjustments.

Occupation patterns differ significantly between trivial and non-trivial phases.

Dynamic occupation analysis reveals observable differences across topological configurations.

Abstract

We have theoretically investigated Su-Schrieffer-Heeger chains modelled as optical lattices (OL) loaded with exciton-polaritons. The chains have been subject to the resonant pumping of the edge site and shaken in either adiabatic or high-frequency regime. The topological state has been controlled by the relative phases of the lasers constructing the OL. The dynamic problem of the occupation of the lattice sites and eigenstates has been semi-classically solved. Finally, the analysis of the occupation numbers evolution has revealed that gapless, topologically trivial and non-trivial chain configurations demonstrate perceptible behaviour from both qualitative (occupation pattern) and quantitative (total occupation) points of view.