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Q: Fachverband Quantenoptik und Photonik

Q 13: Posters: Quantum Optics and Photonics I

Q 13.23: Poster

Montag, 9. März 2020, 16:30–18:30, Empore Lichthof

Semiclassical Laser Cooling in a Strongly Focussed Laser Field — •Maximilian Schumacher, Thorsten Haase, and Gernot Alber — Institut für Angewandte Physik, Technische Universität Darmstadt, Hochschulstraße 4a, D-64289 Darmstadt

The semiclassical theory of laser cooling above the Doppler limit describes many experiments in quantum optics and quantum information science. In this contribution this semiclassical laser theory is applied to describe a scenario in which a (classical) laser field is strongly focused. Our investigation is motivated by the 4PiPac experiment [1] performed in Erlangen in which a single ion is trapped in the focus of a parabolic mirror and is driven almost resonantly by a laser field entering this cavity as a plane wave. Modelling this ion by a degenerate multi-level system the influence of the strongly focused laser beam and its peculiar polarization properties on the center-of-mass motion of the ion are explored. Comparison of these results with the corresponding results of a two-level model for the ion exhibit the characteristic effects caused by this peculiar polarization dependence of the laser field.

[1] Alber L., Fischer M., Bader M., Mantel K., Sondermann M., Leuchs G., J. Europ. Opt. Soc. Rap. Public. 13, 14 (2017)