Abstract

We consider dark solitons and their stability in spin-orbit coupled polariton condensates. The system supports spinor solitons of two types: conventional (symmetric) dark solitons and asymmetric half-dark solitons. They demonstrate essentially different behavior upon variation of the strength of spin-orbit coupling. One-dimensional spin-orbit coupled dark solitons are usually unstable, while half-dark solitons can be stable. Two-dimensional dark solitons at early stages of the development of transverse instabilities turn into asymmetric snaking patterns and later into sets of vortex–antivortex solitons with notably different shapes. Depending on the sign of spin-orbit coupling, two distinct instability scenarios are possible for such solitons, in which vortices in one component correspond to vortices or antivortices in other component. The decay of two-dimensional half-dark solitons results in the formation of half-vortex chains.

© 2018 Optical Society of America

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Supplementary Material (4)

NameDescription
» Visualization 1       Transverse instability development for dark polariton soliton with zero spin-orbit coupling coefficient.
» Visualization 2       Transverse instability development for dark polariton soliton with negative spin-orbit coupling coefficient.
» Visualization 3       Transverse instability development for dark polariton soliton with positive spin-orbit coupling coefficient.
» Visualization 4       Transverse instability development for half-dark polariton soliton.

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