Laboratory of Cold Atoms Near Surfaces

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Optical dipole mirror

Optical dipole mirror for cold rubidium atoms

Elastic optical mirror for neutral atoms was proposed by R.J. Cook and R.K. Hill in 1982. It was realized for the first time for the thermal atomic beam in 1988 and for atoms from magnetooptical trap in 1990. The mirror allows the atoms having the velocity component perpendicular to the mirror surface, to be reflected in the proximity of the vacuum-dielectric border.

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Investigation of radiation pressure exerted by evanescent wave

Our current research consern investigation of mechanical interaction of evanescent wave with cloud of cold atoms in the vicinity of dielectric surface. Particularly, radiation pressure exerted on reflecting atoms is measured. An additional auxiliary weak evanescent wave (called „resonant”) with precisely controlled intensity, detuning, polarization and decay length was added to the mirror setup. In the same time, cold atoms are reflected by repulsive potential provided by the so called „main” evanescent wave, which is independant of the resonant wave. In such a setup incoherent photon scattering is measured in the regime close to (1-5 Γ) and far off (> 10 Γ) resonance.

Some of the results are presented in: J. Fiutowski, D. Bartoszek-Bober, T. Dohnalik, T. Kawalec Evanescent wave mirror for cold atoms—A quasi-resonant case, Opt. Commun. 297, 59 (2013)

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Mirror simulation

Czesław Makarski, during his internship, adapted the simulation of the dipole mirror operation for our website. The simulation was based on dr Tomasz Kawalec's and Beata Strack's code. Open Java applet.

dipole mirror simulation