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Q: Quantenoptik und Photonik

Q 29: Poster Quanteneffekte

Q 29.10: Poster

Tuesday, March 14, 2006, 16:30–18:30, Labsaal

Normal mode splitting and mechanical effects of an optical lattice in a ring cavity — •Malik Lindholdt, Julian Klinner, Boris Nagorny, and Andreas Hemmerich — Institut für Laserphysik, Universität Hamburg, Luruper Chaussee 149, 22761 Hamburg

A novel regime of atom-cavity physics is explored, arising when large atom samples dispersively interact with high-finesse optical cavities. A stable far detuned optical lattice of several million rubidium atoms is formed inside an optical ring resonator by coupling equal amounts of laser light to each propagation direction of a longitudinal cavity mode. An adjacent longitudinal mode, detuned by about 3 GHz, is used to perform probe transmission spectroscopy of the system. The atom-cavity coupling for the lattice beams and the probe is dispersive and dissipation results only from the finite photon-storage time. The observation of two well-resolved normal modes demonstrates the regime of strong cooperative coupling. The details of the normal mode spectrum reveal mechanical effects associated with the retroaction of the probe upon the optical lattice.

[1] Julian Klinner, Malik Lindholdt, Boris Nagorny and Andreas Hemmerich, quant-ph/0512121