Collective Atom–Light Interactions in Dense Atomic Vapours by James Keaveney

By James Keaveney

The propagation of sunshine in 'dense media' the place dipole-dipole interactions play a job is a basic subject that used to be first studied within the paintings of Clausius, Mossotti, Lorenz and Lorentz within the latter 1/2 the 19th century. in spite of the fact that, till lately there remained a few components of controversy: for instance, while the Lorentz version for a gasoline predicts a resonance shift, a discrete dipole version doesn't. This thesis makes the 1st mixed dimension of either the Lorentz shift and the linked collective Lamb shift. This transparent experimental outcome encouraged new theoretical paintings that has considerably complicated our knowing of sunshine propagation in interacting media.

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10 is shown when we look at the difference between open and closed transitions. In this case, the open transition is the absorption measured at the resonance frequency of the 85 Rb Fg = 2 → Fe = 3 transition, and the ‘closed’ transition is the absorption measured with the laser on resonance with the 85 Rb Fg = 3 → Fe = 4 transition. 0 0 10 101 102 103 104 Intensity (I/ISat ) 105 106 Fig. 10 Peak absorption as a function of laser intensity for cell thicknesses of 120 nm (red diamonds), 390 nm (green circles), and 4 mm (blue triangles), probed with a focussed laser beam with a 1/e2 radius of 15 µm.

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