Detection of slow atoms confined in a Cesium vapor cell by spatially separated pump and probe laser beams
| Autor: | Todorov, Petko, Petrov, Nikoolay, Maurin, Isabelle, Saltiel, Solomon, Bloch, Daniel |
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| Rok vydání: | 2013 |
| Předmět: | |
| Zdroj: | Proceedings of SPIE 8770 (2013) 87700P |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1117/12.2014930 |
| Popis: | The velocity distribution of atoms in a thermal gas is usually described through a Maxwell-Boltzman distribution of energy, and assumes isotropy. As a consequence, the probability for an atom to leave the surface under an azimuth angle {\theta} should evolve as cos {\theta}, in spite of the fact that there is no microscopic basis to justify such a law. The contribution of atoms moving at a grazing incidence towards or from the surface, i.e. atoms with a small normal velocity, here called "slow" atoms, reveals essential in the development of spectroscopic methods probing a dilute atomic vapor in the vicinity of a surface, enabling a sub-Doppler resolution under a normal incidence irradiation. The probability for such "slow" atoms may be reduced by surface roughness and atom-surface interaction. Here, we describe a method to observe and to count these slow atoms relying on a mechanical discrimination, through spatially separated pump and probe beams. We also report on our experimental progresses toward such a goal. Comment: proceedings of 17th International School on Quantum Electronics: Laser Physics and Applications, neesebar, bulgaria Sept 2012 edited by Tanja Dreischuh, Albena Daskalova |
| Databáze: | arXiv |
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