Effect of photoions on the line shape of the Foerster resonance lines and microwave transitions in cold rubidium Rydberg atoms

Journal Article · Sun Jan 15 04:00:00 EST 2012 · Journal of Experimental and Theoretical Physics

DOI:https://doi.org/10.1134/S1063776111160102· OSTI ID:22027950

Tretyakov, D B; Beterov, I I; Entin, V M; Yakshina, E A; Dyubko, S F; Alekseev, E A; Pogrebnyak, N L ^[1]; Bezuglov, N N ^[2]; Arimondo, E ^[3]

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1. National Academy of Sciences of Ukraine, Institute of Radio Astronomy (Ukraine)
2. St. Petersburg State University (Russian Federation)
3. Universita di Pisa (Italy)

Experiments are carried out on the spectroscopy of the Foerster resonance lines Rb(37P) + Rb(37P) {yields} Rb(37S) + Rb(38S) and microwave transitions nP {yields} n Prime S, n Prime 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 Foerster resonance. Various sources of line broadening in cold Rydberg atoms are analyzed.

• OSTI ID: 22027950
• Journal Information: Journal of Experimental and Theoretical Physics, Journal Name: Journal of Experimental and Theoretical Physics Journal Issue: 1 Vol. 114; ISSN JTPHES; ISSN 1063-7761
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
ATOMS
ELECTRIC FIELDS
EMISSION SPECTRA
EMISSION SPECTROSCOPY
EXCITATION
INTERATOMIC FORCES
LASER RADIATION
LINE BROADENING
MHZ RANGE
MICROWAVE RADIATION
RESONANCE
RUBIDIUM
RYDBERG STATES
TRAPS