Intermolecular energy transfer in the presence of dispersing and absorbing media -: art. no. 043813
Intermolecular energy transfer in the presence of dispersing and absorbing media -: art. no. 043813
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DOI：
10.1103/physreva.65.043813
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发表时间：
2002-04-01
影响因子：
2.9
通讯作者：
Welsch, DG
中科院分区：
文献类型：
--
作者：
Dung, HT;Knöll, L;Welsch, DG
通过利用 Kramers-Kronig 一致介质中电磁场量子化的格林函数概念，给出了在存在任意形状、分散和吸收材料体的情况下分子间能量转移速率的严格量子力学推导。研究了其在散装材料、多层平面结构和微球中的应用。结果表明，当两个分子靠近平面界面时，表面导波会强烈影响能量转移，并从本质上改变传输速率的 (Forster) 短程 R-6 依赖性和长程 R-2 依赖性，这通常在自由空间中观察到。特别地，能量转移的增强（抑制）可以伴随着供体衰变的抑制（增强）。给出了四层和五层平面结构的结果并与实验结果进行了比较。最后，简要讨论了位于微球外部完全相反位置的两个分子之间的能量传递。
By making use of the Green-function concept of quantization of the electromagnetic field in Kramers-Kronig consistent media, a rigorous quantum-mechanical derivation of the rate of intermolecular energy transfer in the presence of arbitrarily shaped, dispersing, and absorbing material bodies is given. Applications to bulk material, multislab planar structures, and microspheres are studied. It is shown that when the two molecules are near a planar interface, then surface-guided waves can strongly affect the energy transfer and essentially modify both the (Forster) short-range R-6 dependence of the transfer rate and the long-range R-2 dependence, which are typically observed in free space. In particular, enhancement (inhibition) of energy transfer can be accompanied by inhibition (enhancement) of donor decay. Results for four- and five-layered planar structures are given and compared with experimental results. Finally, the energy transfer between two molecules located at diametrically opposite positions outside a microsphere is briefly discussed.