Optical control of spin textures in quasi-one-dimensional polariton condensates

TL;DR

This paper demonstrates optical control of spin textures in polariton condensates within a microcavity ridge, revealing spin precession behavior influenced by energy and polarization, supported by experimental and theoretical analysis.

Contribution

It introduces a detailed experimental and theoretical study of spin transport and precession in polariton condensates in a quasi-one-dimensional setting.

Findings

Observation of sinusoidal spin precession in real space

Phase of spin precession depends on emission energy

Agreement between experiments and generalized Gross-Pitaevskii simulations

Abstract

We investigate, through polarization-resolved spectroscopy, the spin transport by propagating polariton condensates in a quasi one-dimensional microcavity ridge along macroscopic distances. Under circularly polarized, continuous-wave, non-resonant excitation, a sinusoidal precession of the spin in real space is observed, whose phase depends on the emission energy. The experiments are compared with simulations of the spinor-polariton condensate dynamics based on a generalized Gross-Pitaevskii equation, modified to account for incoherent pumping, decay and energy relaxation within the condensate.