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Long range influence of surface-polariton on atom internal dynamics

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6 Author(s)
M. Fichet ; Lab. de Physique des Lasers, Univ. Paris XIII, Villetaneuse, France ; H. Failache ; S. Saltiel ; M. P. Gorza
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Analysis of the data of FM SR lineshapes using a fitting method that simultaneously accounts for the dispersive and the dissipative effects of the resonant coupling. In the theoretical model, two dimensionless parameters A and B describe the overall z-3 coupling. A=2k3C30 represents the strength of the vW attraction (γ0, homogeneous linewidth) and B = k3Γ (k = ω0/c with ω0 the frequency of the probed transition in the free space) is for the modified decay rate, with the resonantly-enhanced transition width defined by:γ(z) = γ0(1+Γ/z3). The experiments are performed on Cs (6D32/) interacting with a sapphire surface with its c-axis parallel to the surface. Fits are carried out for the two hyperfine components (F = 3 and F = 4) of the probed transition 6P12/ → 6D32/, and for different values of the Cs temperature. In comparison, present report deals with a situation when the two parameters A and B are comparable, as due to the detuning of the sapphire polariton resonance with the birefringence orientation axis: indeed, for a c-axis parallel to the sapphire window, the atomic de-excitation channel is close to the center of the surface resonance, and this tends to maximize the dissipative effects, while the associated dispersive effect is no longer the dominant one.

Published in:

Quantum Electronics Conference, 2003. EQEC '03. European

Date of Conference:

22-27 June 2003