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Q: Quantenoptik

Q 431: Poster: Quanteneffekte

Q 431.8: Poster

Donnerstag, 7. März 2002, 16:30–18:30, Schloss

The atomic kaleidoscope — •PWH. Pinkse, T. Fischer, P. Maunz, T. Puppe und G. Rempe — Max-Planck-Institut für Quantenoptik, 85748 Garching

It has been demonstrated that the phase shift and losses induced by a single atom can significantly influence the field inside a high-finesse cavity [1,2]. These effects depend on the amplitude of the field at the position of the atom and, hence, on the spatial dependence of the cavity mode function. The transmission of the cavity can therefore be used to deduce position information on the atom.

The atomic kaleidoscope exploits the fact that an atom redistributes photons between near-degenerated higher-order transverse modes, and changes their relative phases such that the transmitted spatial intensity pattern will show a local maximum or minimum near the transversal position of the atom. The potential of this method is demonstrated by reconstruction of a realistic trajectory from a semiclassical simulation using a set of Laguerre-Gaussian modes [3]. This reconstruction requires no presumptions on the motion of the atom.

[1] P.W.H. Pinkse, T. Fischer, P. Maunz, and G. Rempe, Nature 404, 365-368 (2000).

[2] C.J. Hood, T.W. Lynn, A.C. Doherty, A.S. Parkins, and H.J. Kimble Science 287, 1447-1453 (2000).

[3] P. Horak, H. Ritsch, T. Fischer, P. Maunz, T. Puppe, P.W.H. Pinkse, and G. Rempe, Phys. Rev. Lett. (in press).