Surface Optomechanics: Calculating Optically Excited Acoustical Whispering Gallery Modes in Microspheres

Abstract

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.

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Document Details

Document Type
Technical Report
Publication Date
Jul 18, 2011
Accession Number
ADA553971

Entities

People

  • Gaurav Bahl
  • John Zehnpfennig
  • Matthew Tomes
  • Tal Carmon

Organizations

  • United States Military Academy

Tags

Communities of Interest

  • Advanced Electronics
  • Sensors

DTIC Thesaurus Topics

  • Acoustic Propagation
  • Acoustic Waves
  • Acoustics
  • Brillouin Scattering
  • Crystal Lattice Vibrations
  • Detectors
  • Doppler Effect
  • Frequency
  • Lasers
  • Microelectromechanical Systems
  • Optical Fibers
  • Optics
  • Resonance
  • Scattering
  • Standing Waves
  • Surface Acoustic Waves
  • United States Military Academy

Fields of Study

  • Physics

Readers

  • Atmospheric Science / Meteorology, specifically Wind Wave Turbulence.
  • Optical Physics and Photonics.
  • Quantum spin resonance or Electron Paramagnetic Resonance spectroscopy.