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  • Letter

Twisting an optomechanical cavity

Daigo Oue1,2,3 and Mamoru Matsuo2,4,5

  • 1Instituto Superior Técnico, University of Lisbon, 1049-001 Lisboa, Portugal
  • 2Kavli Institute for Theoretical Sciences, University of Chinese Academy of Sciences, Beijing 100190, China
  • 3Department of Physics, Imperial College London, London SW7 2AZ, England, United Kingdom
  • 4CAS Center for Excellence in Topological Quantum Computation, University of Chinese Academy of Sciences, Beijing 100190, China
  • 5Advanced Science Research Center, Japan Atomic Energy Agency, Tokai 319-1195, Japan

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Phys. Rev. A 106, L041501 – Published 20 October, 2022

DOI: https://doi.org/10.1103/PhysRevA.106.L041501

Abstract

Mechanical rotation and oscillation have far lower frequencies than light does; thus they are not coupled to each other conventionally. In this Letter, we show that the torsional mechanical oscillation of an optical cavity can be coupled to the optical modes by introducing birefringence, which produces nondegenerate modes in the cavity: ordinary and extraordinary rays. Twisting the cavity mixes them and modulates the electromagnetic energy. We find the torsional optomechanical Hamiltonian by quantizing the total energy and reveal that the torsional oscillation can be resonantly driven by light.

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Phys. Rev. A 106, L041501– Published 20 October, 2022
  • Received 15 December 2019
  • Revised 30 May 2022
  • Accepted 7 October 2022
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