Reconstructing the dynamics of a movable mirror in a detuned optical cavity

Mauro Paternostro, S. Gigan, Myungshik Kim, F. Blaser, H.R. Bohm, M. Aspelmeyer

Research output: Contribution to journalArticle

88 Citations (Scopus)


We consider the dynamics of a movable mirror in a Fabry-Perot cavity coupled through radiation pressure to the cavity field and in contact with a thermal bath at finite temperature. In contrast to previous approaches, we consider arbitrary values of the effective detuning between the cavity and an external input field. We analyse the radiation-pressure effect on the Brownian motion of the mirror and its significance in the density noise spectrum of the output cavity field. Important properties of the mirror dynamics can be gathered directly from this noise spectrum. The presented reconstruction provides an experimentally useful tool in the characterization of the energy and rigidity of the mirror as modified by the coupling with light. We also give a quantitative analysis of the recent experimental observation of self-cooling of a micromechanical oscillator.
Original languageEnglish
Article number107
Pages (from-to)107-108
Number of pages2
JournalNew Journal of Physics
Publication statusPublished - 23 Jun 2006

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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