Collective atomic effects in resonant fluorescence (A)

Eleftherios Panagiotis Apostolidis, Lorenzo M. Narducci

S. Ya. Kilin

Andrew I. Trubilko, Ashat M. Basharov

A new collective effect has been revealed in resonance fluorescence: the side and central components of the triplet in the emission spectrum of an atomic ensemble excited by an intense coherent field are narrowed in the case of the critical number of atoms in the ensemble.

Helen S. Freedhoff

The resonance fluorescence of a two-atom system interacting collectively with an intense driving field is studied. The first-order dispersion forces, or dipole-dipole interaction, between the atoms is included as well. The scattered-light spectrum is found to differ considerably from the single-atom spectrum even for very intense driving fields, in direct contrast with the results obtained by Agarwal et al., who studied the two-atom system but neglected the dipole-dipole interaction. The effects of collective scattering are calculated on the fluorescence spectra of idealized beams of atoms moving with uniform velocity, for a number of different number densities $〈N〉$.

P. Cérez, V. Giordano, N. Dimarcq +2 more

The authors report an accurate method of measurement of the fluorescence collection efficiency in a resonant light-atom interaction experiment. The measurement consists in a precise comparison of the absorption and fluorescence signals. Using this technique, optimisation of the optical collecting set-up can be made as well as signal-to-noise predictions in the optical detection of atoms. It allows one to study fine physical effects such as anisotropy of the fluorescent light.

Constantine Mavroyannis