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Topological Hall effect in nonlinear optics
Soumik Nandi (National Institute of Science Education and Research Bhubaneswar, Homi Bhabha National Institute), Arannya Ghosh (Indian Institute of Technology Delhi), Ashok K Mohapatra (National Institute of Science Education and Research Bhubaneswar, Homi Bhabha National Institute), Ritwick Das (Indian Institute of Technology Delhi)

Topological Hall effect in nonlinear optics
We present an experimental evidence of \emph{topological} Hall-effect in an all-optical third-order nonlinear optical process via spatial symmetry-breaking in pseudo-spin textures created by a spatially-structured pump laser beam. The experimental configuration consists of a moderately-focused pump laser beam undergoing a parametric interaction with an organic solvent (toluene) and an off-resonant laser beam probes the non-trivial spatial magnetization textures created by the pump beam. The pha…