Photon-photon polaritons in χ(2) microresonators

Skryabin, D. V., Pankratov, V. V., Villois, A. and Puzyrev, D. N. (2021) Photon-photon polaritons in χ(2) microresonators. Physical Review Research, 3 (1). ISSN 2643-1564

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Abstract

We consider a high-Q microresonator with χ(2) nonlinearity under conditions when the coupling rate between the sidebands around the pump and its second harmonic exceeds the damping rates, implying the strong coupling regime (SC). Using the dressed-resonator approach we demonstrate that this regime leads to the dominance of the Hermitian part of the operator, driving the sideband dynamics over its non-Hermitian part responsible for the parametric gain. This has allowed us to introduce and apply the cross-area concept of the polariton quasiparticles and their effective masses in the context of χ(2) ring microresonators. We further use polaritons to predict the modified spectral response of the resonator to the weak probe field, and to reveal the splitting of the bare-resonator resonances, avoided crossings, and Rabi dynamics. Polariton basis also allows the deriving of a discrete sequence of the parametric thresholds for generation of sidebands of different orders.

Item Type:	Article
Uncontrolled Keywords:	physics and astronomy(all) ,/dk/atira/pure/subjectarea/asjc/3100
Faculty \ School:	Faculty of Science > School of Engineering, Mathematics and Physics
UEA Research Groups:	Faculty of Science > Research Groups > Quantum Matter Faculty of Science > Research Groups > Fluids & Structures
Related URLs:	http://www.scopus.com/inward/record.url?...
Depositing User:	LivePure Connector
Date Deposited:	17 Feb 2026 01:35
Last Modified:	22 Feb 2026 07:30
URI:	https://ueaeprints.uea.ac.uk/id/eprint/101973
DOI:	10.1103/PhysRevResearch.3.L012017

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