Population Inversion on Transition into the Ground State of Atoms Induced by Optical Excitation and Collisions

• Authors: R. Markov , A. Plekhanov , A. Shalagin
• Languages of publication: EN

Abstracts

EN

Lasing on the sodium resonance transitions (D_1 and D_2 lines) at the superluminosity regime was observed upon the non-resonance excitation in the presence of a buffer gas. Dependences of the lasing intensity on the pump radiation intensity and its frequency detuning from the frequencies of resonance transitions were examined. It was found that under the specific experimental conditions (high buffer gas pressure, sufficiently high intensity of pump radiation) upon the large positive frequency detuning of pump radiation with respect to the frequency of resonance ("working") transition, contrary to ingrained conceptions, population inversion for the "working" transition is raised. That results in the observed phenomena.

Keywords

EN

42.50.Hz; 32.90.+a; 42.50.Ct

Discipline

• 42.50.Ct: Quantum description of interaction of light and matter; related experiments
• 42.50.Hz: Strong-field excitation of optical transitions in quantum systems; multiphoton processes; dynamic Stark shift(for multiphoton ionization and excitation of atoms and molecules, see 32.80.Rm, and 33.80.Rv, respectively)
• 32.90.+a: Other topics in atomic properties and interactions of atoms with photons (restricted to new topics in section 32)

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2002
• Volume: 101
• Issue: 1
• Pages: 77-88

Dates

published

2002-01

received

2001-06-28

Contributors

author

R. Markov

• Institute of Automation and Electrometry, Siberian Branch of Russian Academy of Science, Pr. Ak. Koptyuga 1, Novosibirsk, 630090, Russia

author

A. Plekhanov

• Institute of Automation and Electrometry, Siberian Branch of Russian Academy of Science, Pr. Ak. Koptyuga 1, Novosibirsk, 630090, Russia

author

A. Shalagin

• Institute of Automation and Electrometry, Siberian Branch of Russian Academy of Science, Pr. Ak. Koptyuga 1, Novosibirsk, 630090, Russia

References

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Identifiers

DOI

10.12693/APhysPolA.101.77