Stuttgart 2012 – wissenschaftliches Programm
Q 35.66: Poster
Mittwoch, 14. März 2012, 16:30–19:00, Poster.I+II
Vibrational ground state cooling of a neutral atom in a tightly focused optical dipole trap — Syed Abdullah Aljunid, Victor Xu Heng Leong, •Kadir Durak, Gleb Maslennikov, and Christian Kurtsiefer — Centre for Quantum Technologies / Dept. of Physics, National University of Singapore
We have shown that a substantial interaction between light and single trapped atom can be achieved by strongly fosucing the light into the position of the atom[1-3]. However, for optimal interaction the atom has to be well localized at the field maximum. The position uncertainty due to residual kinetic energy of the atom in the dipole trap (depth ∼ 1mK) is still significant after molasses cooling (few 100 nm). To address this problem we implement a Raman Sideband cooling technique, similar to the one commonly used in ion traps , to cool a single 87Rb atom to the ground state of the trap. We have cooled the along the transverse trap axis (trap frequency ντ=81 kHz), to a mean vibratonal state n_τ=0.55 and investigate the impact on atom-light interfaces.
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