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The van der Waals (vW) long-range atom-surface interaction is often described as a dipole-dipole interaction, originating in the coupling between the quantum dipole fluctuations of an atom and the instantaneously induced fluctuations in the electrostatic image. Due to the finite light velocity, this atom-surface interaction is better understood in the more general frame of the Casimir-Polder theory...
The paper reports on the observation of extra sub-Doppler resonance in the vicinity of the third resonance line of Cs (6Srarr8P) at 388 nm (6S1/2rarr8P3/2) and 389 nm (6S1/2rarr8P1/2), when saturated absorption spectroscopy is usually expected to provide a frequency reference in the analysis of other physical processes. All the extra-lines that were detected were located inside the Doppler width,...
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