Excitonic oscillator-strength saturation dominates polariton-polariton interactions
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arXiv
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| Auteurs principaux: | , , , , , , , , , , |
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| Format: | Preprint |
| Publié: |
2025
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| _version_ | 1866913648111255552 |
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| author | Richard, Maxime Frérot, Irénée Ravets, Sylvain Bloch, Jacqueline Anton-Solanas, Carlos Claude, Ferdinand Zhou, Yueguang Morassi, Martina Lemaître, Aristide Carusotto, Iacopo Minguzzi, and Anna |
| author_facet | Richard, Maxime Frérot, Irénée Ravets, Sylvain Bloch, Jacqueline Anton-Solanas, Carlos Claude, Ferdinand Zhou, Yueguang Morassi, Martina Lemaître, Aristide Carusotto, Iacopo Minguzzi, and Anna |
| contents | Exciton-polaritons in semiconductor microcavities exhibit large two-body interactions that, thanks to ever refined nanotechnology techniques, are getting closer and closer to the quantum regime where single-photon nonlinearities start being relevant. To foster additional progress in this direction, in this work we experimentally investigate the microscopic mechanism driving polariton-polariton interactions. We measure the dispersion relation of the collective excitations that are thermally generated on top of a coherent fluid of interacting lower-polaritons. By comparing the measurements with the Bogoliubov theory over both the lower and upper polariton branches simultaneously, we find that polariton-polariton interactions stem dominantly from a mechanism of saturation of the exciton oscillator strength. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2501_07899 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Excitonic oscillator-strength saturation dominates polariton-polariton interactions Richard, Maxime Frérot, Irénée Ravets, Sylvain Bloch, Jacqueline Anton-Solanas, Carlos Claude, Ferdinand Zhou, Yueguang Morassi, Martina Lemaître, Aristide Carusotto, Iacopo Minguzzi, and Anna Mesoscale and Nanoscale Physics Quantum Gases Exciton-polaritons in semiconductor microcavities exhibit large two-body interactions that, thanks to ever refined nanotechnology techniques, are getting closer and closer to the quantum regime where single-photon nonlinearities start being relevant. To foster additional progress in this direction, in this work we experimentally investigate the microscopic mechanism driving polariton-polariton interactions. We measure the dispersion relation of the collective excitations that are thermally generated on top of a coherent fluid of interacting lower-polaritons. By comparing the measurements with the Bogoliubov theory over both the lower and upper polariton branches simultaneously, we find that polariton-polariton interactions stem dominantly from a mechanism of saturation of the exciton oscillator strength. |
| title | Excitonic oscillator-strength saturation dominates polariton-polariton interactions |
| topic | Mesoscale and Nanoscale Physics Quantum Gases |
| url | https://arxiv.org/abs/2501.07899 |