Radiation pressure driven vibrational modes in ultra-high-Q silica microspheres

Details Radiation pressure driven vibrational modes in ultra-high-Q silica microspheres Radiation pressure driven vibrational modes in ultra-high-Q silica microspheres

2007-02-28

arxiv.org/abs/physics/0702252v1

Physics

Optics

Scientific paper

10.1364/OL.32.002200

Quantitative measurements of the vibrational eigenmodes in ultra-high-Q silica microspheres are reported. The modes are efficiently excited via radiation-pressure induced dynamical back-action of light confined in the optical whispering-gallery modes of the microspheres (i.e. via the parametric oscillation instability). Two families of modes are studied and their frequency dependence on sphere size investigated. The measured frequencies are in good agreement both with Lamb's theory and numerical finite element simulation and are found to be proportional to the sphere's inverse diameter.

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