1. Microscopic theory of polariton-polariton interactions
- Author
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Christensen, Esben R., Camacho-Guardian, Arturo, Cotlet, Ovidiu, Imamoglu, Atac, Wouters, Michiel, Bruun, Georg M., and Carusotto, Iacopo
- Subjects
Condensed Matter - Mesoscale and Nanoscale Physics ,Condensed Matter - Quantum Gases - Abstract
We develop a comprehensive theoretical model for the interaction strength between a pair of exciton-polaritons in microcavity devices. Ab initio numerical calculations for dipolar polaritons in one dimension are used as a starting point to build a Born-Oppenheimer theory that generally applies to generic -- dipolar or non-dipolar polaritons -- in both one and two dimensions. This theory anticipates that the strong coupling to the cavity mode leads to a drastic enhancement of the polariton interactions as compared to bare excitons, and predicts unexpected scaling laws in the interaction strength as a function of system parameters. Comparisons with available experimental data are drawn, and specific suggestions to validate it with new experiments are made. Promising strategies towards the observation of a strong polariton blockade regime are finally sketched., Comment: Main manuscript: 18 pages, 6 figures. Appendix: 2 pages, 2 figures
- Published
- 2022
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