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Coherent backscattering of light by a laser-cooled gas of rubidium atoms

G. Labeyrie, J. C. BERNARD, C. MULLER, C. MINIATURA, R. KAISER, F. De Tomasi

Published Jan 1, 2000• 0 citations
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Journal de Physique IV (Proceedings)•May 1, 2000•0 citations
We report the first observation of coherent backscattering of light from a sample of laser-cooled atoms. Rubidium 85 atoms are captured from a room-temperature vapor in a magneto-optical trap, and illuminated with a laser probe. The angular intensity distribution of the backscattered light is recorded on a cooled CCD detector. We observe a small enhancement factor in all polarization channels, including the helicity preserving channel where the enhancement is only 1.08. This surprising observation is attributed to the existence of contrast reduction processes involving the atom's internal structure.