Topological Hall effect in nonlinear optics

• URL: http://arxiv.org/abs/2510.01820v1
• Date: Thu, 02 Oct 2025 09:06:41 GMT
• Title: Topological Hall effect in nonlinear optics
• Authors: Soumik Nandi, Arannya Ghosh, Ashok K Mohapatra, Ritwick Das,
• Abstract summary: We present an experimental evidence of emphtopologicalaxial Hall-effect in an all-optical third-order nonlinear optical process.<n>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.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: 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 phase-profile of the transmitted probe beam is extracted using phase-retrieval algorithms for ascertaining the topological charge which is shown to be consistent with the estimation of Berry's curvature that we obtain via paraxial approximation-based modeling of third-order nonlinear interaction.

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