Coherent Oscillations in an Exciton-Polariton Josephson Junction

TL;DR

This paper reports the observation of spontaneous coherent oscillations in an exciton-polariton Josephson junction, demonstrating analogies with the AC Josephson effect through experimental and theoretical analysis.

Contribution

It introduces a two-mode theoretical model explaining coherent oscillations and phase relations in exciton-polariton Josephson junctions.

Findings

Observation of spontaneous coherent oscillations in polariton junctions

Demonstration of AC Josephson effect analogy in polariton systems

Development of a two-mode model explaining phase dynamics

Abstract

We report on the observation of spontaneous coherent oscillations in a microcavity polariton bosonic Josephson junction. The condensation of exciton polaritons takes place under incoherent excitation in a disordered environment, where double potential wells tend to appear in the disordered landscape. Coherent oscillations set on at an excitation power well above the condensation threshold. The time resolved population and phase dynamics reveal the analogy with the AC Josephson effect. We have introduced a theoretical two-mode model to describe the observed effects, which allows us to explain how the different realizations of the pulsed experiment have a similar phase relation.