Regensburg 2010 – wissenschaftliches Programm

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DY: Fachverband Dynamik und Statistische Physik

DY 30: Posters II

DY 30.22: Poster

Donnerstag, 25. März 2010, 16:00–18:00, Poster C

Dynamical multistability in a multimode optomechanical system — •Huaizhi Wu^1,2, Georg Heinrich¹, and Florian Marquardt¹ — ¹LMU, Department of Physics, ASC, CeNS, 80333 München, Germany — ²Department of Physics, Fuzhou University, 350002 Fuzhou, Fujian, P. R. China

Optomechanical systems couple mechanical motion of macroscopic objects to electromagnetic fields. The standard setup comprises a laser-driven cavity with a movable end-mirror whose motion changes the optical resonance frequency and thus acts back on the light field. Studies of the complex nonlinear dynamics for this system revealed several dynamical attractors due to phase locking between the mechanical oscillations of the mirror and the ringing of the light intensity. Here we study such dynamical multistability for a novel setup where a moveable membrane is placed in the middle between two high-finesse mirrors. The membrane couples two optical modes residing in the left and right half of the cavity, respectively. Its motion is determined by the coupled light-field dynamics that was recently studied elsewhere and shows two-level dynamics such as Autler-Townes splittings and Landau-Zener-Stueckelberg oscillations. Here we discuss the result of these effects on the nonlinear dynamics in terms of the attractor diagram for different parameter regimes. This is the first study of dynamical multistability in one of the exciting new setups with multiple coupled optical (and vibrational) modes that have been developed recently.