Superradiant Rayleigh scattering in a ring cavity
S. Slama, S. Bux, G. Krenz, C. Zimmermann, Ph. W. Courteille
Abstract
Collective interaction of light with an atomic gas can give rise to superradiant instabilities. We experimentally study the sudden build-up of a reverse light field in a laser-driven high-finesse ring cavity filled with ultracold thermal or condensed atoms. While superradiant Rayleigh scattering from atomic clouds is normally only observed at very low temperatures (i.e. well below 1 μK), the presence of the ring cavity enhances cooperativity and allows for superradiance with thermal clouds as hot as several 10 μK. A characterization of the superradiance at various temperatures and cooperativity parameters allows us to link it to the collective atomic recoil laser.
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