Observation of Suppression of Light Scattering Induced by Dipole-Dipole Interactions in a Cold-Atom Ensemble
Résumé
We study the emergence of collective scattering in the presence of dipole-dipole interactions when we
illuminate a cold cloud of rubidium atoms with a near-resonant and weak intensity laser. The size of the
atomic sample is comparable to the wavelength of light. When we gradually increase the number of atoms
from 1 to ∼450, we observe a broadening of the line, a small redshift and, consistently with these, a strong
suppression of the scattered light with respect to the noninteracting atom case. We compare our data to
numerical simulations of the optical response, which include the internal level structure of the atoms.
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PRL113p133602a2014.pdf (475.71 Ko)
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1402.4167.pdf (298.35 Ko)
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