Excitonic oscillator-strength saturation dominates polariton-polariton interactions
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.
Authors
- J. Bloch (ORCID: https://orcid.org/0000-0001-7823-8420)
- Yueguang Zhou (ORCID: https://orcid.org/0000-0002-5652-2911)
- Irénée Frérot (ORCID: https://orcid.org/0000-0002-7703-8539)
- Anna Minguzzi (ORCID: https://orcid.org/0000-0003-3531-8759)
- Martina Morassi (ORCID: https://orcid.org/0000-0001-6472-2916)
- Sylvain Ravets (ORCID: https://orcid.org/0000-0003-1746-5245)
- Ferdinand Claude (ORCID: https://orcid.org/0000-0003-1118-7379)
- Iacopo Carusotto
- Aristide Lemaître
- Anonymous
- Carlos Anton-Solanas
Institutions
- Centre for Quantum Technologies (SG)
- Nanyang Technological University (SG)
- University of Trento (IT)
- Laboratoire Kastler Brossel (FR)
- Sorbonne Université (FR)
- Centre de Nanosciences et de Nanotechnologies (FR)
- Laboratoire de Physique et Modélisation des Milieux Condensés (FR)
- Laboratoire Médiations (FR)
- Institut des langues et cultures d'Europe, Amérique, Afrique, Asie et Australie (FR)
- Universidad Autónoma de Madrid (ES)
- Université Grenoble Alpes (FR)
Publication Details
- Journal
- Physical Review Research
- Published
- 2026-01-30
- DOI
- https://doi.org/10.1103/r8m8-hckx
- Citations
- 1
- Primary Topic
- Strong Light-Matter Interactions
- Type
- article
- Field-Weighted Citation Impact
- 31.39