In-situ measurements of light diffusion in an optically dense atomic ensemble
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arXiv
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| Main Authors: | , , , , , , |
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| Format: | Preprint |
| Published: |
2024
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| _version_ | 1866909317888737280 |
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| author | Glicenstein, Antoine Apoorva, Apoorva Orenes, Daniel Benedicto Letellier, Hector de Melo, Alvaro Mitchell Galvão Saint-Jalm, Raphaël Kaiser, Robin |
| author_facet | Glicenstein, Antoine Apoorva, Apoorva Orenes, Daniel Benedicto Letellier, Hector de Melo, Alvaro Mitchell Galvão Saint-Jalm, Raphaël Kaiser, Robin |
| contents | This study introduces a novel method to investigate in-situ light transport within optically thick ensembles of cold atoms, exploiting the internal structure of alkaline-earth metals. A method for creating an optical excitation at the center of a large atomic cloud is demonstrated, and we observe its propagation through multiple scattering events. In conditions where the cloud size is significantly larger than the transport mean free path, a diffusive regime is identified. We measure key parameters including the diffusion coefficient, transport velocity, and transport time, finding a good agreement with diffusion models. We also demonstrate that the frequency of the photons launched inside the system can be controlled. This approach enables direct time- and space-resolved observation of light diffusion in atomic ensembles, offering a promising avenue for exploring new diffusion regimes. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2409_11117 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | In-situ measurements of light diffusion in an optically dense atomic ensemble Glicenstein, Antoine Apoorva, Apoorva Orenes, Daniel Benedicto Letellier, Hector de Melo, Alvaro Mitchell Galvão Saint-Jalm, Raphaël Kaiser, Robin Atomic Physics Optics Quantum Physics This study introduces a novel method to investigate in-situ light transport within optically thick ensembles of cold atoms, exploiting the internal structure of alkaline-earth metals. A method for creating an optical excitation at the center of a large atomic cloud is demonstrated, and we observe its propagation through multiple scattering events. In conditions where the cloud size is significantly larger than the transport mean free path, a diffusive regime is identified. We measure key parameters including the diffusion coefficient, transport velocity, and transport time, finding a good agreement with diffusion models. We also demonstrate that the frequency of the photons launched inside the system can be controlled. This approach enables direct time- and space-resolved observation of light diffusion in atomic ensembles, offering a promising avenue for exploring new diffusion regimes. |
| title | In-situ measurements of light diffusion in an optically dense atomic ensemble |
| topic | Atomic Physics Optics Quantum Physics |
| url | https://arxiv.org/abs/2409.11117 |