Static disorder-induced renormalization of polariton group velocity
Fuente:
arXiv
Guardado en:
| Autores principales: | , |
|---|---|
| Formato: | Preprint |
| Publicado: |
2025
|
| Materias: | |
| Acceso en línea: | |
| Etiquetas: |
Agregar Etiqueta
Sin Etiquetas, Sea el primero en etiquetar este registro!
|
| _version_ | 1866915368002387968 |
|---|---|
| author | Aroeira, Gustavo J. R. Ribeiro, Raphael F. |
| author_facet | Aroeira, Gustavo J. R. Ribeiro, Raphael F. |
| contents | Molecular exciton-polaritons exhibit long-range, ultrafast propagation, yet recent experiments have reported far slower propagation than expected. In this work, we implement a nonperturbative approach to quantify how static energetic disorder renormalizes polariton group velocity in strongly coupled microcavities. The method requires no exact diagonalization or master equation propagation, and depends only on measurable parameters: the mean exciton energy and its variance, the microcavity dispersion, and the Rabi splitting. Using parameters corresponding to recently probed organic microcavities, we show that exciton inhomogeneous broadening slows both lower and upper polaritons, particularly when the mean exciton energy fluctuation approaches the collective light-matter coupling strength. A detailed discussion and interpretation of these results is provided using perturbation theory in the limit of weak resonance scattering. Overall, our results support the view that exciton-phonon interactions likely dominate the recent experimental observations of polariton slowdown in disordered media. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2507_00918 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Static disorder-induced renormalization of polariton group velocity Aroeira, Gustavo J. R. Ribeiro, Raphael F. Quantum Physics Mesoscale and Nanoscale Physics Chemical Physics Molecular exciton-polaritons exhibit long-range, ultrafast propagation, yet recent experiments have reported far slower propagation than expected. In this work, we implement a nonperturbative approach to quantify how static energetic disorder renormalizes polariton group velocity in strongly coupled microcavities. The method requires no exact diagonalization or master equation propagation, and depends only on measurable parameters: the mean exciton energy and its variance, the microcavity dispersion, and the Rabi splitting. Using parameters corresponding to recently probed organic microcavities, we show that exciton inhomogeneous broadening slows both lower and upper polaritons, particularly when the mean exciton energy fluctuation approaches the collective light-matter coupling strength. A detailed discussion and interpretation of these results is provided using perturbation theory in the limit of weak resonance scattering. Overall, our results support the view that exciton-phonon interactions likely dominate the recent experimental observations of polariton slowdown in disordered media. |
| title | Static disorder-induced renormalization of polariton group velocity |
| topic | Quantum Physics Mesoscale and Nanoscale Physics Chemical Physics |
| url | https://arxiv.org/abs/2507.00918 |