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Conference on Lasers and Electro-Optics

Sensitive spectroscopy and atom dynamics in a single beam optical trap

Nir Friedman, Lev Khaykovich, Stanislav B. Baluschev, Roee Ozeri, Ariel Kaplan, D. Fathi, Nir Davidson

Published Aug 29, 2005• 0 citations
Publisher

Abstract

Summary form only given. Cold atoms are trapped in a dark optical trap which is created by a rapidly (up to 400 kHz) scanning far-detuned laser beam, where the scanning speed is much faster then any characteristic atomic motional time scale. This concept offers the possibility to form nearly arbitrary-shaped effective optical potentials and also to change them in real time. We report on spectroscopic and dynamical measurements in such a rotating beam trap.

DOI
10.1109/iqec.2000.907977

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Summary form only given. Cold atoms are trapped in a dark optical trap which is created by a rapidly (up to 400 kHz) scanning far-detuned laser beam, where the scanning speed is much faster then any characteristic atomic motional time scale. This concept offers the possibility to form nearly arbitrary-shaped effective optical potentials and also to change them in real time. We report on spectroscopic and dynamical measurements in such a rotating beam trap.
We propose and demonstrate a scheme for a blue-detuned optical dipole trap for cold atoms which consists of a single, rapidly rotating laser beam. We characterize a parameter range in which the optical potential can be accurately described by a quasistatic time-averaged potential. The trap is loaded with >106>{10}^{6}>106 Rb atoms, and is then compressed adiabatically by a factor of 350 to a final density of $5\ifmmode\times\else\texttimes\fi{}{10}^{13}$ ${\mathrm{cm}}^{\ensuremath{-}3}.$ $\mathrm{A}\ensuremath{\sim}4$ times adiabatic increase in the peak phase-space density of the trapped atoms is obtained due to the change in the shape of the trap potential. The two-body elastic and inelastic collision rates of atoms in the compressed trap are determined.