Mainz 2017 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 40: Poster: Quantum Optics and Photonics II

Q 40.16: Poster

Wednesday, March 8, 2017, 17:00–19:00, P OG2

Laser Cooling in a Parabolic Mirror — •Thorsten Haase, Nils Trautmann, and Gernot Alber — Institut für Angewandte Physik, Technische Universität Darmstadt, 64289 Darmstadt

The efficient coupling of light to single quantum receivers is of high interest in quantum optics and quantum communication. In current experiments coupling inside a parabolic mirror is investigated [1]. We propose a semiclassical theory for laser cooling inside the parabolic mirror which includes both standing waves and strongly focused waves. Our treatment predicts relevant deviations from the usual case of Doppler cooling which typically considers plane running waves only. These generalisations affect the motion of the particle and lead to different probability density functions inside the trap. Stochastic simulations are presented for the probability density function. First one-dimensional simulations show that the steady states inside the parabolic mirror deviate from Gaussian or thermal distributions, which are predicted by the theory of Doppler cooling with plane waves. This could explain recent experimental results. Also, we present three-dimensional simulations investigating these effects for more realistic setups.

[1] M. Fischer, M. Bader, R. Maiwald, A. Golla, M. Sondermann, and G. Leuchs, Applied Physics B 117 (2014)