We study the dipole–dipole spectral broadening of a resonance line at high atomic densities when the self-broadening dominates. The selective reflection spectrum of a weak probe beam from the interface of the cell window and rubidium vapour is recorded in the presence of a far-detuned pump beam. The excitation due to the pump reduces the self-broadening. We found that the self-broadening reduction dependence on the pump power is atomic density independent. These results provide experimental evidence for the disordered exciton based theory of self-broadening, and can be useful for the description of the interaction of a strong optical field with a dense resonance medium.We study the dipole–dipole spectral broadening of a resonance line at high atomic densities when the self-broadening dominates. The selective reflection spectrum of a weak probe beam from the interface of the cell window and rubidium vapour is recorded in the presence of a far-detuned pump beam. The excitation due to the pump reduces the self-broadening. We found that the self-broadening reduction dependence on the pump power is atomic density independent. These results provide experimental evidence for the disordered exciton based theory of self-broadening, and can be useful for the description of the interaction of a strong optical field with a dense resonance medium.

arXiv:0811.0575Journal of Physics B Atomic Molecular and Optical PhysicsMar 9, 200939 citations

Resonance broadening in high density gases

Haider R. Zaidi

The resonance broadening of a transition between two excited states of a radiator in a high density gas is investigated. The important many body shielding contributions are included to all orders, and the two body correlations for the close collisions are approximately taken into account. Corrections to the line width and shift at moderately high densities are calculated. The results agree with the experimental data for krypton. The density dependence of the width parameter is examined at very high densities also. It is found that this parameter, after reaching a peak value, decreases with further increase in the density. Moreover, the square root dependence of the line widths on the density is not valid over any extended range of gas densities.The resonance broadening of a transition between two excited states of a radiator in a high density gas is investigated. The important many body shielding contributions are included to all orders, and the two body correlations for the close collisions are approximately taken into account. Corrections to the line width and shift at moderately high densities are calculated. The results agree with the experimental data for krypton. The density dependence of the width parameter is examined at very high densities also. It is found that this parameter, after reaching a peak value, decreases with further increase in the density. Moreover, the square root dependence of the line widths on the density is not valid over any extended range of gas densities.

Canadian Journal of PhysicsJul 15, 197710 citations

Absorption and Collision Broadening of Resonance Radiation

Mark W. Zemansky

Physical ReviewNov 15, 19300 citations

Pressure dependence of Na resonance line broadening by Kr and Xe

W.P. West, Alan C. Gallagher

The fluorescent spectrum of the Na $D$ lines, pressure broadened by Xe and Kr, has been measured for noble-gas densities of 2\ifmmode\times\else\texttimes\fi{} ${10}^{19}$ -3\ifmmode\times\else\texttimes\fi{} ${10}^{20}$ ${\mathrm{cm}}^{\ensuremath{-}3}$; at the lower density, the lines are isolated while, at the higher, they are severely blended. The spectra are obtained in normalized intensity units allowing the nonbinary behavior of the line wing intensity to be clearly observed. At the lower density the broadening is well characterized by isolated binary interactions; at the higher density multiple-perturber interactions dominate. Nonlinearities in the pressure dependence of shifts, widths, and satellite shape are reported.The fluorescent spectrum of the Na $D$ lines, pressure broadened by Xe and Kr, has been measured for noble-gas densities of 2\ifmmode\times\else\texttimes\fi{}${10}^{19}$-3\ifmmode\times\else\texttimes\fi{}${10}^{20}$ ${\mathrm{cm}}^{\ensuremath{-}3}$; at the lower density, the lines are isolated while, at the higher, they are severely blended. The spectra are obtained in normalized intensity units allowing the nonbinary behavior of the line wing intensity to be clearly observed. At the lower density the broadening is well characterized by isolated binary interactions; at the higher density multiple-perturber interactions dominate. Nonlinearities in the pressure dependence of shifts, widths, and satellite shape are reported.

Physical Review AApr 1, 197835 citations

Resonance broadening in a strong light field

S. P. Andreev, Valerii S. Lisitsa

Journal of Experimental and Theoretical PhysicsJan 1, 19771 citation

The fluorescent spectrum of the Na

D

lines, pressure broadened by Xe and Kr, has been measured for noble-gas densities of 2\ifmmode\times\else\texttimes\fi{}

{10}^{19}

-3\ifmmode\times\else\texttimes\fi{}

{10}^{20}

${\mathrm{cm}}^{\ensuremath{-}3}$; at the lower density, the lines are isolated while, at the higher, they are severely blended. The spectra are obtained in normalized intensity units allowing the nonbinary behavior of the line wing intensity to be clearly observed. At the lower density the broadening is well characterized by isolated binary interactions; at the higher density multiple-perturber interactions dominate. Nonlinearities in the pressure dependence of shifts, widths, and satellite shape are reported.