Open AccessCold atom Raman spectrography using velocity-selective resonances
Author(s) -
Fredrik K. Fatemi,
Matthew L. Terraciano,
Mark Bashkansky,
Zachary Dutton
Publication year - 2009
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.17.012971
Subject(s) - hyperfine structure , atomic physics , magnetic field , ultracold atom , physics , spectroscopy , ground state , optics , magneto optical trap , atom (system on chip) , raman spectroscopy , laser , quantum mechanics , computer science , quantum , embedded system
We have studied velocity-selective resonances in the presence of a uniform magnetic field and shown how they can be used for rapid, single-shot assessment of the ground state magnetic sublevel spectrum in a cold atomic vapor. Cold atoms are released from a magneto-optical trap in the presence of a small bias magnetic field ( approximately 300 mG) and exposed to a laser field comprised of two phase-locked counterpropagating beams connecting the two ground state hyperfine manifolds. An image of the expanded cloud shows the velocity-selected resonances as distinct features, each corresponding to specific magnetic sublevel, in a direct, intuitive manner. We demonstrate the technique with both 87Rb and 85Rb, and show the utility of the technique by optically pumping into particular magnetic sublevels. The results are shown to agree with a theoretical model, and are compared to traditional Raman spectroscopy.