Polariton Condensation in a One-Dimensional Disordered Potential

TL;DR

This paper investigates how disorder affects the coherence and density of a non-equilibrium exciton-polariton condensate in a one-dimensional system, revealing disorder-induced modulation and the influence of pump power.

Contribution

It provides experimental evidence linking disorder-induced density modulation to coherence properties in a non-equilibrium polariton condensate in one dimension.

Findings

Disorder causes modulation of the condensate density.

Coherence function shows non-monotonous behavior due to disorder.

Increased pump power enhances density modulation.

Abstract

We study the coherence and density modulation of a non-equilibrium exciton-polariton condensate in a one-dimensional valley with disorder. By means of interferometric measurements we evidence a modulation of the first-order coherence function and we relate it to a disorder-induced modulation of the condensate density, that increases as the pump power is increased. The non-monotonous spatial coherence function is found to be the result of the strong non-equilibrium character of the one-dimensional system, in the presence of disorder.