Chiral light from an emitter coupled to an achiral particle via the Purcell effect
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arXiv
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| Auteurs principaux: | , , , |
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| Format: | Preprint |
| Publié: |
2025
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| _version_ | 1866917029303287808 |
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| author | Xuan, Yining Miyazaki, Daito Ishikawa, Yuki Sadgrove, Mark |
| author_facet | Xuan, Yining Miyazaki, Daito Ishikawa, Yuki Sadgrove, Mark |
| contents | We demonstrate that non-chiral nanoparticles can produce chiral light when point emitters are coupled to their surface plasmon modes (SPMs) under certain conditions. Chiral emission arises from asymmetrical plasmon mode propagation from the source combined with the spin-momentum locked nature of the SPMs. The Purcell regime of cavity quantum electrodynamics (QED) ensures that radiation from the coupled mode dominates over that from the emitter itself, giving rise to photons with a circularly polarized component -- i.e. chiral light. We experimentally demonstrate this effect using electron beam-induced cathode luminescence from a gold nanorod, coupling it evanescently to a nanofiber probe which also supports spin-momentum locked light. This converts the net spin of the emission into a net directionality of propagation in the fiber modes. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2510_18166 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Chiral light from an emitter coupled to an achiral particle via the Purcell effect Xuan, Yining Miyazaki, Daito Ishikawa, Yuki Sadgrove, Mark Quantum Physics We demonstrate that non-chiral nanoparticles can produce chiral light when point emitters are coupled to their surface plasmon modes (SPMs) under certain conditions. Chiral emission arises from asymmetrical plasmon mode propagation from the source combined with the spin-momentum locked nature of the SPMs. The Purcell regime of cavity quantum electrodynamics (QED) ensures that radiation from the coupled mode dominates over that from the emitter itself, giving rise to photons with a circularly polarized component -- i.e. chiral light. We experimentally demonstrate this effect using electron beam-induced cathode luminescence from a gold nanorod, coupling it evanescently to a nanofiber probe which also supports spin-momentum locked light. This converts the net spin of the emission into a net directionality of propagation in the fiber modes. |
| title | Chiral light from an emitter coupled to an achiral particle via the Purcell effect |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2510.18166 |