Absolute Determination of the Single-Photon Optomechanical Coupling Rate via a Hopf Bifurcation

Year: 2021

Authors: Piergentili P., Li W., Natali R., Vitali D., Di Giuseppe G.

Autors Affiliation: School of Science and Technology, Physics Division, University of Camerino, Camerino, MC I-62032, Italy; Infn, Sezione di Perugia, Perugia (PG), I-06123, Italy; CNR-INO, L.go Enrico Fermi 6, Firenze, I-50125, Italy

Abstract: We establish a method for the determination of the single-photon optomechanical coupling rate, which characterizes the radiation pressure interaction in an optomechanical system. The estimation of the rate with which a mechanical oscillator, initially in a thermal state, undergoes a Hopf bifurcation, and reaches a limit cycle, allows us to determine the single-photon optomechanical coupling rate in a simple and consistent way. Most importantly, and in contrast to other methods, our method does not rely on knowledge of the system?s bath temperature and on a calibration of the signal. We provide the theoretical framework and experimentally validate this method, providing a procedure for the full characterization of an optomechanical system, which could be extended outside cavity optomechanics, whenever a resonator is driven into a limit cycle by the appropriate interaction with another degree of freedom.


Volume: 15 (3)      Pages from: 034012-1  to: 034012-11

More Information: We acknowledge support from the European Union Horizon 2020 Programme for Research and Innovation through Project No. 732894 (FET Proactive HOT) and the Project QuaSeRT funded by the QuantERA ERA-NET Cofund in Quantum Technologies. P.P. acknowledges support from the European Union´s Horizon 2020 Programme for Research and Innovation under Grant No. 722923 (Marie Curie ETN -OMT).
KeyWords: optomechanics; microcavity
DOI: 10.1103/PhysRevApplied.15.034012