Transmutation from Skyrmions to Half-Solitons Driven by the Nonlinear Optical Spin-Hall Effect

TL;DR

This paper explores how nonlinear optical effects transform Skyrmion lattices into half-solitons in exciton-polariton systems, revealing new spin domain behaviors and emission patterns.

Contribution

It demonstrates the nonlinear-driven transition from Skyrmions to half-solitons and characterizes the associated spin current focalization and emission anisotropy.

Findings

Skyrmion lattices form in linear optical spin-Hall effect.

Nonlinear interactions compress spin domains and induce Skyrmion to half-soliton transition.

Transition leads to anisotropic emission patterns and focused spin currents.

Abstract

We show that the polarization domains generated in the linear optical spin-Hall effect by the analog of spin-orbit interaction for exciton-polaritons are associated with the formation of a Skyrmion lattice. In the non-linear regime, the spin anisotropy of the polariton-polariton interactions results in a spatial compression of the spin domains and in an abrupt transformation of the Skyrmions into half-solitons, associated with both the focalization of the spin currents and the emergence of a strongly anisotropic emission pattern.