Abstract
In this paper, we measure the spectrum of light scattered by a cold atomic cloud driven by a strong laser beam. The experimental technique is based on heterodyne spectroscopy coupled to single-photon detectors and intensity correlations. At resonance, we observe the Mollow triplet. This spectrum is quantitatively compared to the theoretical one, emphasizing the influence of the temperature of the cloud and the finite-size of the laser beam. Off resonance measurements are also done showing a very good agreement with theory.
Highlights
The Mollow triplet, described theoretically by B
We present the measurement of the spectrum of light scattered by a cold atomic cloud and driven by a strong laser field
The temperature measured by time of flight (TOF) technique is of the order of 100 μK before applying the strong laser beams to detect the Mollow spectrum
Summary
The Mollow triplet, described theoretically by B. Besides its importance in describing the atom fluorescence, it can be viewed as a fundamental signature of quantum optics, highlighted by photon correlations between the peaks of the spectrum and antibunching in some particular cases. These correlations were first observed by A. Schrama et al in 1992 [3] which had remained the state of the art until recently This topic has attracted a renewed interest [4], mainly in solid state physics where, for example, Mollow triplet in a quantum dot appears as a promising candidate of heralded single-photon sources [5]
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