https://doi.org/10.1140/epjd/e2016-70212-8
Regular Article
Buffer gas-assisted four-wave mixing resonances in alkali vapor excited by a single cw laser
1 Institute for Physical Research, NAS of Armenia, 0203 Ashtarak, Armenia
2 Department of Physics and Earth Sciences, University of Ferrara, via Saragat 1, 44122 Ferrara, Italy
3 Department of Physical Sciences, Earth and Environment, University of Siena, via Roma 56, 53100 Siena, Italy
a
e-mail: papoyan@ipr.sci.am
Received: 22 March 2016
Received in final form: 30 May 2016
Published online: 6 December 2016
We report the observation of a fluorescence peak appearing in dilute alkali (Rb, Cs) vapor in the presence of a buffer gas when the cw laser radiation frequency is tuned between the Doppler-broadened hyperfine transition groups of an atomic D2 line. Based on steep laser radiation intensity dependence above the threshold and spectral composition of the observed features corresponding to atomic resonance transitions, we have attributed these features to the buffer gas-assisted four-wave mixing process.
Key words: Atomic Physics
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag 2016
