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Photon-photon polaritons in chi(2) microresonators
- Source :
- Physical Review Research, vol 3, issue 1, L012017 (2021)
- Publication Year :
- 2021
-
Abstract
- We consider a high-Q microresonator with $\chi^{(2)}$ nonlinearity under conditions when the coupling rates between the sidebands around the pump and second harmonic exceed 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 side-band 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 quasi-particles and define their effective masses in the context of $\chi^{(2)}$ ring-microresonators. We further use polaritons to predict the modified spectral response of the resonator to a weak probe field, and to reveal splitting of the bare-resonator resonances, avoided crossings, and Rabi dynamics. Polariton basis also allows deriving a discrete sequence of the parametric thresholds for the generation of sidebands of different orders.<br />Comment: 7 pages
- Subjects :
- Physics - Optics
Condensed Matter - Quantum Gases
Quantum Physics
Subjects
Details
- Database :
- arXiv
- Journal :
- Physical Review Research, vol 3, issue 1, L012017 (2021)
- Publication Type :
- Report
- Accession number :
- edsarx.2102.08977
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1103/PhysRevResearch.3.L012017