吸收散射体量子化介质附近的原子衰变
Atomic decay near a quantized medium of absorbing scatterers
摘要：
利用量子电动力学模型研究了受激原子在既散射又吸收辐射的介质中的衰变。介质由填充有随机分布的一组非重叠球体的半空间表示，所述球体由线性吸收性介电材料组成。的吸收效应描述通过一个量子化的阻尼极化激元理论。据发现，有效的磁化率的散装不完全占介质引起的原子衰变率的变化。事实上，表面效应也有助于改变衰变特性。讨论了散射和吸收在总衰变率中的相互作用。
英文摘要：
The decay of an excited atom in the presence of a medium that both scatters and absorbs radiation is studied with the help of a quantum-electrodynamical model. The medium is represented by a half space filled with a randomly distributed set of non-overlapping spheres, which consist of a linear absorptive dielectric material. The absorption effects are described by means of a quantized damped-polariton theory. It is found that the effective susceptibility of the bulk does not fully account for the medium-induced change in the atomic decay rate. In fact, surface effects contribute to the modification of the decay properties as well. The interplay of scattering and absorption in the total decay rate is discussed.
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