AIP Advances (Dec 2014)

Dynamical back-action at 5.5 GHz in a corrugated optomechanical beam

  • D. Navarro-Urrios,
  • J. Gomis-Bresco,
  • S. El-Jallal,
  • M. Oudich,
  • A. Pitanti,
  • N. Capuj,
  • A. Tredicucci,
  • F. Alzina,
  • A. Griol,
  • Y. Pennec,
  • B. Djafari-Rouhani,
  • A. Martínez,
  • C. M. Sotomayor Torres

DOI
https://doi.org/10.1063/1.4902171
Journal volume & issue
Vol. 4, no. 12
pp. 124601 – 124601-7

Abstract

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We report on the optomechanical properties of a breathing mechanical mode oscillating at 5.5 GHz in a 1D corrugated Si nanobeam. This mode has an experimental single-particle optomechanical coupling rate of |go,OM| = 1.8 MHz (|go,OM|/2π = 0.3 MHz) and shows strong dynamical back-action effects at room temperature. The geometrical flexibility of the unit-cell would lend itself to further engineering of the cavity region to localize the mode within the full phononic band-gap present at 4 GHz while keeping high go,OM values. This would lead to longer lifetimes at cryogenic temperatures, due to the suppression of acoustic leakage.