Quantized Media with Absorptive Scatterers and Modified Atomic Emission Rates

Details Quantized Media with Absorptive Scatterers and Modified Atomic Emission Rates Quantized Media with Absorptive Scatterers and Modified Atomic Emission Rates

2011-02-14

arxiv.org/abs/1102.2802v1

Physics

Quantum Physics

6 pages, 4 figures

Scientific paper

Modifications in the spontaneous emission rate of an excited atom that are caused by extinction effects in a nearby dielectric medium are analyzed in a quantummechanical model, in which the medium consists of spherical scatterers with absorptive properties. Use of the dyadic Green function of the electromagnetic field near a a dielectric sphere leads to an expression for the change in the emission rate as a series of multipole contributions for which analytical formulas are obtained. The results for the modified emission rate as a function of the distance between the excited atom and the dielectric medium show the influence of both absorption and scattering processes.

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