Quantum Electronics

Resonant optical characteristics of an ultracold laser plasma

Н. И. Косарев, N. Ya. Shaparev

Published Dec 31, 2009• 6 citations

Abstract

We report a computer simulation study of light absorption, scattering and emission at 397 nm in an ultracold calcium ion plasma under resonant excitation. The results point to spectral asymmetry of light scattering, nonlinear absorption, and emission in the plasma. An approach is proposed for ultracold plasma diagnostics using resonant optical characteristics.

DOI: 10.1070/qe2009v039n12abeh014094

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Quantum Electronics

Resonant optical characteristics of an ultracold laser plasma

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Published Dec 31, 2009• 6 citations

Publisher

Abstract

DOI: 10.1070/qe2009v039n12abeh014094

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10^{11}

^{-3}

. Fundamental interest stems from the possibility of creating strongly-coupled plasmas, but recombination, collective modes, and thermalization in these systems have also been studied. Optical absorption images of a strontium plasma, using the Sr

^+

{^2S_{1/2}} -> {^2P_{1/2}}

transition at 422 nm, depict the density profile of the plasma, and probe kinetics on a 50 ns time-scale. The Doppler-broadened ion absorption spectrum measures the ion velocity distribution, which gives an accurate measure of the ion dynamics in the first microsecond after photoionization.

4s3d{{\,}^{1}}{{D}_{2}}{-} 90{{\,}^{1}}{{D}_{2}}

Rydberg transition have been carried out using 672 and 798 nm resonant laser beams. The autoionization resonance is observed during fluorescence of single-charged 40Ca ions at a wavelength of 397 nm. The dependence of the amplitude of autoionization resonance on the density of ions in the continuously generated ultracold plasma is obtained.