Theory of plasmon-assisted transmission of entangled photons -: art. no. 236801
Theory of plasmon-assisted transmission of entangled photons -: art. no. 236801
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DOI：
10.1103/physrevlett.92.236801
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发表时间：
2004-06-11
影响因子：
8.6
通讯作者：
Martín-Moreno, L
中科院分区：
文献类型：
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作者：
Moreno, E;García-Vidal, FJ;Martín-Moreno, L
最近的表面等离子体纠缠实验[E. Altewischer等人，Nature（伦敦）418，304（2002）]进行了理论分析。在非聚焦的情况下，传输时的纠缠保持被发现提供有关的双光子和金属膜的相互作用的信息。在一个完全多模模型的框架中解释了在聚焦情况下的纠缠退化。这种现象是金属纳米结构膜的偏振选择性过滤行为的结果。结果表明，“哪条路”的标签，降低纠缠不位于金属膜的自由度，而是在光子场的空间自由度。
The recent surface plasmon entanglement experiment [E. Altewischer et al., Nature (London) 418, 304 (2002)] is theoretically analyzed. The entanglement preservation upon transmission in the nonfocused case is found to provide information about the interaction of the biphoton and the metallic film. The entanglement degradation in the focused case is explained in the framework of a fully multimode model. This phenomenon is a consequence of the polarization-selective filtering behavior of the metallic nanostructured film. It is shown that the "which-way" labels that degrade entanglement are not located in the degrees of freedom of the metallic film but rather in the spatial degrees of freedom of the photon field.