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- Title
Effect of photoions on the line shape of the Förster resonance lines and microwave transitions in cold rubidium Rydberg atoms.
- Authors
Tretyakov, D.; Beterov, I.; Entin, V.; Yakshina, E.; Ryabtsev, I.; Dyubko, S.; Alekseev, E.; Pogrebnyak, N.; Bezuglov, N.; Arimondo, E.
- Abstract
Experiments are carried out on the spectroscopy of the Förster resonance lines Rb(37 P) + Rb(37 P) → Rb(37 S) + Rb(38 S) and microwave transitions nP → n′ S, n′ D between Rydberg states of cold rubidium atoms in a magneto-optical trap (MOT). Under ordinary conditions, all spectra exhibit a linewidth of 2-3 MHz irrespective of the interaction time between atoms or between atoms and microwave radiation, although the limit resonance width should be determined by the inverse interaction time. The analysis of experimental conditions has shown that the main source of line broadening is the inhomogeneous electric field of cold photoions that are generated under the excitation of initial nP Rydberg states by broadband pulsed laser radiation. The application of an additional electric-field pulse that rapidly extracts photoions produced by a laser pulse leads to a considerable narrowing of lines of microwave resonances and the Förster resonance. Various sources of line broadening in cold Rydberg atoms are analyzed.
- Subjects
RESONANCE; PHASE transitions; RUBIDIUM; RYDBERG states; SPECTRUM analysis; MAGNETOOPTICS; MAGNETIC traps; ELECTRIC fields; SPECTRAL line broadening; ELECTRONIC excitation
- Publication
Journal of Experimental & Theoretical Physics, 2012, Vol 114, Issue 1, p14
- ISSN
1063-7761
- Publication type
Article
- DOI
10.1134/S1063776111160102