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Journal of Physics B Atomic and Molecular Physics

Cooperative resonance fluorescence and atomic interactions

S. Ya. Kilin

Published Jul 14, 1980• 22 citations
Publisher

Abstract

The effect of interatomic interaction on cooperative resonance fluorescence in the case of well separated components is discussed. It is shown that for two atoms the new components appear both in the emission spectrum and in the intensity correlation function. An increase of the number of interacting atoms leads to an increase in the number of additional spectral components.

DOI
10.1088/0022-3700/13/13/023

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Journal de physique•Jan 1, 1989•2 citations
The effect of interatomic interaction on cooperative resonance fluorescence in the case of well separated components is discussed. It is shown that for two atoms the new components appear both in the emission spectrum and in the intensity correlation function. An increase of the number of interacting atoms leads to an increase in the number of additional spectral components.
The spectrum of resonance fluorescence and the second-order correlation function are calculated for a system of two identical two-level cooperative systems interacting via the dipole-dipole interaction. The results are valid for arbitrary incident-field strengths and for atomic separations much less than the resonant wavelength. The intensity of the sidebands at the Rabi frequency is diminished by the dipole interaction, whereas that of the sidebands at twice the Rabi frequency is enhanced. Both the cooperative behavior and the dipole-dipole interaction act to diminish the photon antibunching, as shown by the second-order correlation function.
We suggest that the statistical properties of the scattered radiation in resonance-fluorescence experiments may be affected significantly by the existence of atomic correlations. The scattered light spectrum from two- and three-atom collective systems has been calculated and compared with the one-atom spectrum. The differences are quite significant for weak fields, but become less pronounced as the intensity of the driving field is increased. In addition, we have calculated the scattered intensity correlation function for collectively interacting systems, and found that its behavior is very different from that of the single-atom intensity correlation function, both for weak and strong incident fields. The implications of our findings for the observation of photon antibunching are also discussed.