Optics-assisted enhanced sensing at radio frequencies in an optoelectromechanical system

Year: 2024

Authors: Eshaqi-Sani N., Zippilli S., Vitali D.

Autors Affiliation: Univ Camerino, Sch Sci & Technol, Phys Div, I-62032 Camerino, MC, Italy; Inst Res Fundamental Sci IPM, Sch Phys, POB 19395-5531, Tehran, Iran; INFN, Sez Perugia, Via A Pascoli, Perugia, Italy; CNR INO, Lgo Enrico Fermi 6, I-50125 Florence, Italy.

Abstract: We investigate a scheme to enhance the sensitivity in detecting weak variations in a parameter of an optoelectromechanical system by detecting the system response at radio frequencies. We consider a setup where either one or two mechanical modes mediate the interaction between an optical cavity and an rf resonator. This system can be operated in a regime of impedance matching where thermal fluctuations are redistributed among the system elements and, in particular, rf output noise can be reduced to the quantum vacuum noise level. We show that this effect can be used to boost the sensitivity in detecting parameter variations also in regimes of high thermal noise. We characterize the performance of this protocol in detecting variations in the capacitance of the rf resonator.

Journal/Review: PHYSICAL REVIEW APPLIED

Volume: 22 (1)      Pages from: 14003-1  to: 14003-17

More Information: We acknowledge the support of PNRR MUR project PE0000023-NQSTI (Italy) .
KeyWords: Impedance matchings; Mechanical; Optical cavities; Optoelectromechanical systems; Quantum vacuum; Radiofrequencies; RF resonators; System elements; System response; Thermal fluctuations
DOI: 10.1103/PhysRevApplied.22.014003

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