Deep optical trap for cold alkaline-Earth atoms.
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.
Instituto de Física Gleb Wataghin, Universidade Estadual de Campinas, CP. 6165 Campinas, SP, 13083-970, Brazil.
Luciano S
LS
Cruz
Milena
M
Sereno
Flavio C
FC
Cruz
D000468:Alkalies / Q000737:chemistry* / Q000528:radiation effects*; D003080:Cold Temperature; D003198:Computer Simulation; D007834:Lasers; D008962:Models, Theoretical; D052898:Optical Tweezers; D055095:Optics and Photonics / Q000295:instrumentation*; D014159:Transducers
D000468:Alkalies