Two-photon Doppler-free spectroscopy of trapped atoms
Claudio Lenz Cesar, Daniel Kleppner
We describe the systematics of two-photon Doppler-free excitation of atoms confined in a cylindrical harmonic trap, at densities far from the regime of quantum degeneracy. The line shape is explained in terms of momentum transfer between the light beam and the trapped atoms. This formalism extends the semiclassical analysis of time-of-flight broadening. The results, which are general, were motivated by the development of two-photon Doppler-free spectroscopy of trapped atomic hydrogen.
Physical Review A•Jun 1, 1999•23 citations