Forced and self-excited oscillations of an optomechanical cavity

Stav Zaitsev, Ashok K Pandey, Oleg Shtempluck, Eyal Buks

Research output: Contribution to journalArticlepeer-review


We experimentally study forced and self-excited oscillations of an optomechanical cavity, which is formed between a fiber Bragg grating that serves as a static mirror and a freely suspended metallic mechanical resonator that serves as a moving mirror. In the domain of small amplitude mechanical oscillations, we find that the optomechanical coupling is manifested as changes in the effective resonance frequency, damping rate, and cubic nonlinearity of the mechanical resonator. Moreover, self-excited oscillations of the micromechanical mirror are observed above a certain optical power threshold. A comparison between the experimental results and a theoretical model that we have recently derived and analyzed yields a good agreement. The comparison also indicates that the dominant optomechanical coupling mechanism is the heating of the metallic mirror due to optical absorption.

Original languageEnglish
Article number046605
Pages (from-to)046605
JournalPhysical Review E - Statistical, Nonlinear, and Soft Matter Physics
Issue number4 Pt 2
StatePublished - 14 Oct 2011

All Science Journal Classification (ASJC) codes

  • Statistical and Nonlinear Physics
  • Statistics and Probability
  • Condensed Matter Physics


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