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Optomechanical characterization of acoustic modes in a mirror

T. Briant·P. F. Cohadon·A. Heidmann·M. Pinard
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Abstract

We present an experimental study of the internal mechanical vibration modes of a mirror. We determine the frequency repartition of acoustic resonances via a spectral analysis of the Brownian motion of the mirror, and the spatial profile of the acoustic modes by monitoring their mechanical response to a resonant radiation pressure force swept across the mirror surface. We have applied this technique to mirrors with cylindrical and plano-convex geometries, and compared the experimental results to theoretical predictions. We have in particular observed the gaussian modes predicted for plano-convex mirrors.

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T. Briant, P. F. Cohadon, A. Heidmann, M. Pinard. 2003-05-21. Optomechanical characterization of acoustic modes in a mirror. https://doi.org/10.1103/physreva.68.033823

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