Microscopic theory of polariton-polariton interactions

Year: 2024

Authors: Christensen E.R., Camacho-Guardian A., Cotlet O., Imamoglu A., Wouters M., Bruun G.M., Carusotto I.

Autors Affiliation: Aarhus Univ, Ctr Complex Quantum Syst, Dept Phys & Astron, Ny Munkegade 120, DK-8000 Aarhus C, Denmark; Univ Nacl Autonoma Mexico, Inst Ingn, Mexico City 04510, Mexico; Swiss Fed Inst Technol, Inst Quantum Elect, CH-8093 Zurich, Switzerland; Univ Antwerp, TQC, Univ Pl 1, B-2610 Antwerp, Belgium; Univ Trento, Pitaevskii BEC Ctr, CNR INO, Via Sommar 14, I-38123 Trento, Italy; Univ Trento, Dipartimento Fis, via Sommar 14, I-38123 Trento, Italy.

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 nondipolar- 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. Finally, promising strategies towards the observation of a strong polariton blockade regime are sketched.

Journal/Review: PHYSICAL REVIEW B

Volume: 110 (19)      Pages from: 195435-1  to: 195435-16

More Information: We acknowledge financial support from the Danish Na-tional Research Foundation through the Center of Excellence CCQ (Grant Agreement No. DNRF156) and the U.S. Army CCDC Atlantic Basic and Applied Research via Grant No.W911NF-19-1-0403. The work at ETH Zurich was supported by the Swiss National Science Foundation (SNSF) under Grant No. 200020_207520. I.C. acknowledges financial support from the European Union H2020-FETFLAG-2018-2020 project PhoQuS (Grant No. 820392), from the Provincia Autonoma di Trento, from the Q@TN initiative, and from the National Quantum Science and Technology Institute through the PNRR MUR Project under Grant No. PE0000023-NQSTI, co-funded by the European Union-NextGeneration EU. A.C.G. acknowledges financial support from UNAM DGAPA PAPIIT Grant No. IN108620, PAPIIT Grant No. IA101923, and Grant No. PIIF23. We also thank D. Thureja, P. Murty, D. De Bernardis, and T. Pohl for many discussions.r W911NF-19-1-0403. The work at ETH Zurich was supported by the Swiss National Science Foundation (SNSF) under Grant No. 200020_207520. I.C. acknowledges financial sup-port from the European Union H2020-FETFLAG-2018-2020 project PhoQuS (Grant No. 820392) , from the Provincia Autonoma di Trento, from the Q@TN initiative , and from the National Quantum Science and Technology Institute through the PNRR MUR Project under Grant No. PE0000023-NQSTI, co-funded by the European Union-NextGeneration EU. A.C.G. acknowledges financial support from UNAM DGAPA PAPIIT Grant No. IN108620, PAPIIT Grant No. IA101923, and Grant No. PIIF23. We also thank D. Thureja, P. Murty, D. De Bernardis, and T. Pohl for many discussions.
KeyWords: Quantum Nonlinear Optics; Exciton; Photon; Cavity; Equations; Liquid
DOI: 10.1103/PhysRevB.110.195435