Direct observation of photonic spin Hall effect in Mie scattering
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arXiv
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| Auteurs principaux: | , , , , , , , , , , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866912572600483840 |
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| author | Khan, Aizaz Solodovchenko, Nikolay Gao, Dongliang Kislov, Denis Gu, Xiaoying Sun, Yuchen Gao, Lei Qiu, Cheng-Wei Arsenin, Alexey Bolshakov, Alexey Bobrovs, Vjaceslavs Koval, Olga Shalin, Alexander S. |
| author_facet | Khan, Aizaz Solodovchenko, Nikolay Gao, Dongliang Kislov, Denis Gu, Xiaoying Sun, Yuchen Gao, Lei Qiu, Cheng-Wei Arsenin, Alexey Bolshakov, Alexey Bobrovs, Vjaceslavs Koval, Olga Shalin, Alexander S. |
| contents | The photonic spin Hall effect (PSHE), a hallmark of spin-orbit interaction of light, has long been considered a promising route toward spin-controlled functionalities in nanophotonics. Yet, its practical realization has been severely limited by the inherently weak spin-orbit coupling in typical systems, resulting in vanishingly small transverse shifts and extremely low scattering efficiency. This fundamental trade-off has rendered the PSHE observable only through complex weak measurement protocols and signal amplification-approaches that come at the cost of further intensity loss, particularly in nanoscale systems. In this work, we overcome this longstanding challenge by introducing a novel mechanism based on symmetry breaking and mode coupling in a standalone scatterer, which unlocks a regime of Friedrich-Wintgen superscattering with strong near-field spin-orbit interaction. This allows for simultaneous enhancement of both the photonic spin Hall shift and the far-field scattering intensity-boosting the latter by nearly two orders of magnitude compared to conventional dipolar particles. Through tailored multipolar interference, the PSHE is made accessible at experimentally convenient angles, enabling post selection-free detection. We report the first direct experimental observation of the PSHE from a single superscattering particle, achieved in the microwave regime via polarization-resolved far-field measurements. Our findings not only validate a new physical pathway for enhancing spin-dependent light-matter interactions, but also establish a robust, scalable platform for spin-based photonic technologies. This breakthrough opens new avenues in precision optical metrology, advanced imaging, LIDAR systems, and integrated photonic circuitry, bridging a critical gap between fundamental spin optics and real-world applications. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2507_03611 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Direct observation of photonic spin Hall effect in Mie scattering Khan, Aizaz Solodovchenko, Nikolay Gao, Dongliang Kislov, Denis Gu, Xiaoying Sun, Yuchen Gao, Lei Qiu, Cheng-Wei Arsenin, Alexey Bolshakov, Alexey Bobrovs, Vjaceslavs Koval, Olga Shalin, Alexander S. Optics The photonic spin Hall effect (PSHE), a hallmark of spin-orbit interaction of light, has long been considered a promising route toward spin-controlled functionalities in nanophotonics. Yet, its practical realization has been severely limited by the inherently weak spin-orbit coupling in typical systems, resulting in vanishingly small transverse shifts and extremely low scattering efficiency. This fundamental trade-off has rendered the PSHE observable only through complex weak measurement protocols and signal amplification-approaches that come at the cost of further intensity loss, particularly in nanoscale systems. In this work, we overcome this longstanding challenge by introducing a novel mechanism based on symmetry breaking and mode coupling in a standalone scatterer, which unlocks a regime of Friedrich-Wintgen superscattering with strong near-field spin-orbit interaction. This allows for simultaneous enhancement of both the photonic spin Hall shift and the far-field scattering intensity-boosting the latter by nearly two orders of magnitude compared to conventional dipolar particles. Through tailored multipolar interference, the PSHE is made accessible at experimentally convenient angles, enabling post selection-free detection. We report the first direct experimental observation of the PSHE from a single superscattering particle, achieved in the microwave regime via polarization-resolved far-field measurements. Our findings not only validate a new physical pathway for enhancing spin-dependent light-matter interactions, but also establish a robust, scalable platform for spin-based photonic technologies. This breakthrough opens new avenues in precision optical metrology, advanced imaging, LIDAR systems, and integrated photonic circuitry, bridging a critical gap between fundamental spin optics and real-world applications. |
| title | Direct observation of photonic spin Hall effect in Mie scattering |
| topic | Optics |
| url | https://arxiv.org/abs/2507.03611 |