Hannover 2013 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 8: Micromechanic oscillators II

Q 8.1: Talk

Monday, March 18, 2013, 14:00–14:15, F 142

Dissipative opto-mechanics in a membrane interferometer — •Henning Kaufer, Andreas Sawadsky, Ramon Moghadas Nia, Sergey Tarabrin, Klemens Hammerer, and Roman Schnabel — Institut für Gravitationsphysik, Leibniz Universität Hannover and Max-Planck-Institut für Gravitationsphysik (Albert-Einstein-Institut), Callinstr. 38, 30167 Hannover, Germany

Opto-mechanical coupling can either be dispersive or dissipative. In the latter case, the movement of a mechanical oscillator rather changes the cavity linewidth than the cavity length. It was found that a signal-recycled Michelson-Sagnac interferometer with translucent, high-Q micromechanical oscillator is a topology that allows for the dissipative coupling mechanism to dominate over the dispersive coupling. The dissipative coupling features cooling in the unresolved sideband regime and some anomalous optical instability for a red and blue detuned cavity. In my talk, I will present the experimental setup and recent results.