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DY: Fachverband Dynamik und Statistische Physik

DY 9: Nonlinear dynamics, synchronization and chaos I

DY 9.1: Vortrag

Montag, 25. Februar 2008, 17:00–17:15, MA 004

Self-induced oscillations in an optomechanical system — •Clemens Neuenhahn^1,2, Maximilian Ludwig^1,2, Constanze Metzger³, Alexander Ortlieb², Ivan Favero⁴, Khaled Karrai², and Florian Marquardt^1,2 — ¹Arnold-Sommerfeld Center for Theoretical Physics — ²Center for Nanoscience and Departement of Physics, Ludwig-Maximilians Universität München, Munich, Germany — ³Boston University, Electrical and Computer Engineering, Boston, MA 02215, USA — ⁴Université Paris Diderot, Laboratoire Matériaux et Phénomènes Quantiques, Bâtiment Condorcet, 75205 Paris CEDEX 13

We have explored the nonlinear dynamics of an optomechanical system consisting of an illuminated Fabry-Perot cavity, one of whose end-mirrors is attached to a vibrating cantilever. Such a system can experience negative light-induced damping and enter a regime of self-induced oscillations. We present a systematic experimental and theoretical study of the ensuing attractor diagram in an experimental setup where the oscillation amplitude becomes large, and the mirror motion is influenced by several optical modes. A theory has been developed that yields detailed quantitative agreement with experimental results. This includes the observation of a regime where two mechanical modes of the cantilever are excited simultaneously.