Polariton transport in one-dimensional channels

TL;DR

This paper theoretically investigates how exciton-polaritons propagate in a one-dimensional microcavity channel, revealing control mechanisms for mass and spin currents influenced by condensate phases and interactions.

Contribution

It introduces a model for polariton transport in 1D channels, demonstrating control of currents and spin domains via condensate phase differences and interactions.

Findings

Current density is inhomogeneous along the channel.

Stationary spin domains can be formed and controlled.

Transport properties depend on phase difference and dissipation.

Abstract

We study theoretically the transport of linearly polarized exciton-polaritons in a quasi one-dimensional microcavity channel separating two polariton condensates generated by optical pumping. The direction and value of mass and spin currents are controlled by the relative phase and polarisation of two condensates, as in the stationary Josephson effect. However, due to dissipation and particle-particle interactions, the current denisty is inhomogeneous: it strongly depends on the coordinate along the axis of the channel. A stationary spin domain can be created in the channel, its position would be sensitive to the phase difference between two bordering condensates.