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Bulletin of the American Physical Society

Spectral and time-dependent multiple light scattering in ultracold atomic $^{85}$Rb

Salim Balik, R. G. Olave, Charles I. Sukenik, Havey, V. M. Datsyuk, D.V. Kupriyanov, Igor M. Sokolov

Published May 17, 2006• 0 citations
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Spectral and time-dependent multiple light scattering in ultracold atomic 85^{85}85Rb
Light scattering dynamics on the F=1→F′=0F=1 \to F'=0F=1→F′=0 transition in a high-density ultracold atomic gas of 87^{87}87Rb
Diffuse light scattering in a ultracold 87^{87}87Rb gas under conditions of electromagnetically induced transparency
We report a combined experimental and theoretical simulation of multiply scattered light dynamics in an ultracold gas of 85Rb atoms. Measurements of the spectral dependence of the time-decay of the scattered light intensity, following pulsed excitation with near resonance radiation, reveals that the decay for long times is nearly exponential, with a decay constant that is largely independent of detuning from resonance. Monte Carlo simulations of the multiple scattering process show that, for large detunings, near resonance scattering of Fourier components of the excitation pulse plays a significant role in the effect. This interpretation is supported by the observations, and successful modelling, of beating between Rayleigh scattered light at the excitation carrier frequency with the Fourier components of the excitation pulse that overlap significantly with the atomic resonance.
Coherent control of weak light localization in ultracold atomic 87^{87}87Rb
We report an experimental study of correlated multiple light scattering in an ultracold gas of 85Rb{}^{85}\mathrm{Rb}85Rb confined in a magneto-optic trap. Measurements are made of the polarization dependence of the spatial and spectral profile of light backscattered from the sample. The results show an interferometric enhancement sensitive to coherent multiple scattering in the atomic gas, and strong variations with the polarization of the incident and detected light. The spatial width and peak value of the enhancement are found to be dependent on the sample size. Comparison of all the measurements with realistic quantum Monte Carlo simulations yields a very good agreement.