Peter Horak et al 1996 Quantum Semiclass. Opt. 8 583 doi:10.1088/1355-5111/8/3/020
Dynamic diffraction of atoms in the recoil-dominated regime
Peter Horak, Klaus M Gheri and Helmut Ritsch
Show affiliationsWe study the dynamic diffraction of atoms by a standing light wave in the limit where the recoil shift is much larger than the atomic linewidth. We demonstrate the appearance of a damped Pendellösung as well as anomalous transmission, which is equivalent to optical pumping into dark superpositions of the same internal atomic state with different external momenta. As an example, we discuss the case of metastable He coupled to the ground state via an anti-Stokes - Raman transition. We show that besides leading to a very narrow velocity selection for the deflected atoms, this effect could, in principle, be used to build a large-angle coherent beamsplitter and a large-area interferometer for metastable helium. We calculate the signal contrast and flux including initial velocity spread and decoherence through spontaneous emission for such an interferometer.
- PACS
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42.50.Ct Quantum description of interaction of light and matter; related experiments
42.50.Ar Photon statistics and coherence theory
42.79.Fm Reflectors, beam splitters, and deflectors
37.10.Vz Mechanical effects of light on atoms, molecules, and ions
32.50.+d Fluorescence, phosphorescence (including quenching)
33.80.Be Level crossing and optical pumping
32.80.Xx Level crossing and optical pumping
32.80.Rm Multiphoton ionization and excitation to highly excited states
- Subjects
- Dates
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Issue 3 (June 1996)
Received 16 November 1995, in final form 5 February 1996
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Dynamic diffraction of atoms in the recoil-dominated regime
Peter Horak et al 1996 Quantum Semiclass. Opt. 8 583
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