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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 19, Iss. 15 — Jul. 18, 2011
  • pp: 14240–14248

Surface optomechanics: calculating optically excited acoustical whispering gallery modes in microspheres

John Zehnpfennig, Gaurav Bahl, Matthew Tomes, and Tal Carmon  »View Author Affiliations

Optics Express, Vol. 19, Issue 15, pp. 14240-14248 (2011)

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Stimulated Brillouin scattering recently allowed experimental excitation of surface acoustic resonances in micro-devices, enabling vibration at rates in the range of 50 MHz to 12 GHz. The experimental availability of such mechanical whispering gallery modes in photonic-MEMS raises questions on their structure and spectral distribution. Here we calculate the form and frequency of such vibrational surface whispering gallery modes, revealing diverse types of surface vibrations including longitudinal, transverse, and Rayleigh-type deformations. We parametrically investigate these various modes by changing their orders in the azimuthal, radial, and polar directions to reveal different vibrational structures including mechanical resonances that are localized near the interface with the environment where they can sense changes in the surroundings.

© 2011 OSA

OCIS Codes
(240.4350) Optics at surfaces : Nonlinear optics at surfaces
(240.6690) Optics at surfaces : Surface waves
(290.1350) Scattering : Backscattering
(290.2558) Scattering : Forward scattering
(280.4788) Remote sensing and sensors : Optical sensing and sensors

ToC Category:
Optics at Surfaces

Original Manuscript: May 16, 2011
Revised Manuscript: June 15, 2011
Manuscript Accepted: June 20, 2011
Published: July 11, 2011

Virtual Issues
Vol. 6, Iss. 8 Virtual Journal for Biomedical Optics

John Zehnpfennig, Gaurav Bahl, Matthew Tomes, and Tal Carmon, "Surface optomechanics: calculating optically excited acoustical whispering gallery modes in microspheres," Opt. Express 19, 14240-14248 (2011)

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