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Control of polarisation rotation and fragmentation of vector vortex beams in nonlinear media

Fully-structured light — light with non-uniform intensity, phase and polarisation — lies at the heart of an emerging and extremely promising field of research, with applications in high-resolution imaging, optical trapping and manipulation of nanoparticles, plasmonic lithography, and optical communication. We show that the interplay of polarisation structure and nonlinearity can be used as a means of controlling both the polarisation distribution and the fragmentation of such beams as they propagate in a self-focusing nonlinear medium.