Surface enhanced van der Waals force
Surface enhanced van der Waals force
复制标题
表面增强范德华力
DOI：
10.1088/0031-8949/2009/t135/014020
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发表时间：
2008
期刊：
影响因子：
2.9
通讯作者：
M. Tomaš
中科院分区：
文献类型：
--
作者：
M. Tomaš
本文研究了真空-介质界面上激发态原子与基态原子的货车德瓦耳斯相互作用，其中激发态原子与系统的表面极化激元模共振耦合.我们证明，在这种情况下，原子之间的非延迟相互作用势是相同的，在一个有效的介质中所描述的平均介电函数的介质接触，除了不同的局部场校正因子。对真空-蓝宝石界面进行的估计表明，非延迟的货车范德华（原子 * 原子）力可以在表面模式共振增强了近三个数量级相比，其自由空间值。由于本配置中的局域场效应，该增强因子比先前估计的相同介质前面的原子大（几乎）一个数量级。
We consider the van der Waals interaction of an excited atom and a ground-state atom across a vacuum–medium interface under the circumstances of the resonant coupling of the excited atom to a surface polariton mode of the system. We demonstrate that the nonretarded interaction potential between the atoms is, in this case, the same as in an effective medium described by the average dielectric function of the media in contact, except for the different local-field correction factor. The estimate performed for the vacuum–sapphire interface shows that the nonretarded van der Waals (atom*–atom) force can be at the surface-mode resonance enhanced by almost three orders of magnitude in comparison to its free-space value. Owing to the local-field effect in the present configuration, this enhancement factor is larger than previously estimated for atoms in front of the same medium by (almost) an order of magnitude.