Intersubband polariton-LO phonon interaction in mid-infrared non-dispersive cavities: experimental demonstration of spontaneous scattering and perspectives towards polariton lasing [Invited]
Year: 2025
Authors: Goulain P., Jeannin M., Pirotta S., Bousseksou A., Biasiol G., Carusotto I., Colombelli R., Manceau JM.
Autors Affiliation: Univ Paris Saclay, CNRS, Ctr Nanosci & Nanotechnol, UMR 9001, 10 Blvd Thomas Gobert, F-91120 Palaiseau, France; CNR IOM, Lab TASC, Area Sci Pk,SS 14 Km 163-5, I-34149 Trieste, Italy; Univ Trento, Pitaevskii BEC Ctr, CNR INO, I-38123 Trento, Italy; Univ Trento, Dipartimento Fis, I-38123 Trento, Italy.
Abstract: We report experimental evidence of the interaction between intersubband polaritons and longitudinal optical phonons in non-dispersive mid-infrared cavities, under resonant optical injection. Light emission originating from spontaneous polariton-phonon scattering is observed at a frequency corresponding to an energy shift of one phonon below the pump frequency. Given the extremely low spontaneous scattering rate, we employ a custom-developed quantum mechanical model to numerically demonstrate the feasibility of stimulating such a process using a pump-probe scheme. Based on this theoretical framework, we identify a set of experimental conditions under which optical gain may be realized in an intersubband polaritonic system. (c) 2025 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement
Journal/Review: OPTICAL MATERIALS EXPRESS
Volume: 15 (12) Pages from: 3070 to: 3085
More Information: H2020 Future and Emerging Technologies (737017) ; French RENATECH network; Provincia Autonoma di Trento (Q@TN Initiative) ; National Quantum Science and Technology Institute (PNRR MUR, PE0000023-NQSTI) ; European Union-NextGeneration EU.KeyWords: Quantum-wells; Absorption; SingleDOI: 10.1364/OME.573310
