Normal-Mode Splitting in a Weakly Coupled Optomechanical System

Journal article (2018)

Authors

Massimiliano Rossi University of Camerino
Nenad Kralj University of Camerino
Stefano Zippilli University of Camerino, Istituto Nazionale di Fisica Nucleare - Sezione di Perugia
Riccardo Natali University of Camerino, Istituto Nazionale di Fisica Nucleare - Sezione di Perugia
Antonio Borrielli Institute of Materials for Electronics and Magnetism, Nanoscience-Trento-FBK Division
G. Pandraud Else Kooi Laboratory , EKL Processing - EEMCS
E. Serra Electronic Components, Technology and Materials - EEMCS , Trento Institute for Fundamental Physics and Application, Else Kooi Laboratory
Giovanni Di Giuseppe University of Camerino, Istituto Nazionale di Fisica Nucleare - Sezione di Perugia
David Vitali CNR-INO, University of Camerino, Istituto Nazionale di Fisica Nucleare - Sezione di Perugia
Department
Else Kooi Laboratory
Copyright: © 2018 Massimiliano Rossi, Nenad Kralj, Stefano Zippilli, Riccardo Natali, Antonio Borrielli, G. Pandraud, E. Serra, Giovanni Di Giuseppe, David Vitali
DOI: https://doi.org/10.1103/PhysRevLett.120.073601
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Published Date

2018

Language

English

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Department

Else Kooi Laboratory

Abstract

Normal-mode splitting is the most evident signature of strong coupling between two interacting subsystems. It occurs when two subsystems exchange energy between themselves faster than they dissipate it to the environment. Here we experimentally show that a weakly coupled optomechanical system at room temperature can manifest normal-mode splitting when the pump field fluctuations are antisquashed by a phase-sensitive feedback loop operating close to its instability threshold. Under these conditions the optical cavity exhibits an effectively reduced decay rate, so that the system is effectively promoted to the strong coupling regime.

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