Open AccessDeep optical trap for cold alkaline-Earth atoms
Author(s) -
Luciano S. Cruz,
Milena Sereno,
Flávio C. Cruz
Publication year - 2008
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.16.002909
Subject(s) - laser cooling , trap (plumbing) , optical lattice , doppler cooling , laser , optics , atomic physics , ultracold atom , alkaline earth metal , materials science , raman cooling , doppler effect , physics , energetic neutral atom , ion , alkali metal , meteorology , scattering , quantum , superfluidity , quantum mechanics , astronomy , inelastic scattering , x ray raman scattering
We describe a setup for a deep optical dipole trap or lattice designed for holding atoms at temperatures of a few mK, such as alkaline-Earth atoms which have undergone only regular Doppler cooling. We use an external optical cavity to amplify 3.2 W from a commercial single-frequency laser at 532 nm to 523 W. Powers of a few kW, attainable with low-loss optics or higher input powers, allow larger trap volumes for improved atom transfer from magneto-optical traps. We analyze possibilities for cooling inside the deep trap, the induced Stark shifts for calcium, and a cancellation scheme for the intercombination clock transition using an auxiliary laser.