Polariton spin jets through optical control

TL;DR

This paper demonstrates the creation of tunable, spin-polarized polariton jets in semiconductor microcavities, controlled by optical excitation patterns, leading to polarization-structured coherent light without gauge fields.

Contribution

It introduces a method to generate reprogrammable spin jets in exciton-polariton condensates using optical non-resonant excitation geometries.

Findings

Spin-polarized jets are controllable via laser polarization patterns.

The system exhibits intricate polarization patterns due to matter-wave interference.

The approach enables polarization-structured coherent light sources without gauge fields.

Abstract

We demonstrate spin polarized jets in extended systems of ballistic exciton-polariton condensates in semiconductor microcavities using optical non-resonant excitation geometries. The structure of the spin jets is determined by the digitally reprogrammable, spatially non-uniform, degree of circular polarization of the excitation laser. The presence of the laser excitation, strong particle interactions, and spin-relaxation leads to a tunable spin-dependent potential landscape for polaritons, with the appearance of intricate polarization patterns due to coherent matter-wave interference. Our work realizes polarization-structured coherent light sources in the absence of gauge fields.