Topological Hall effect in nonlinear optics
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arXiv
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| Autores principales: | , , , |
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| Formato: | Preprint |
| Publicado: |
2025
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| Acceso en línea: | |
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| _version_ | 1866909821103505408 |
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| author | Nandi, Soumik Ghosh, Arannya Mohapatra, Ashok K Das, Ritwick |
| author_facet | Nandi, Soumik Ghosh, Arannya Mohapatra, Ashok K Das, Ritwick |
| contents | 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. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2510_01820 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Topological Hall effect in nonlinear optics Nandi, Soumik Ghosh, Arannya Mohapatra, Ashok K Das, Ritwick Optics Quantum Physics 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. |
| title | Topological Hall effect in nonlinear optics |
| topic | Optics Quantum Physics |
| url | https://arxiv.org/abs/2510.01820 |