Chiral near fields generated from plasmonic optical lattices
Chiral near fields generated from plasmonic optical lattices
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由等离子体光学晶格产生的手性近场
DOI：
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发表时间：
2014
期刊：
影响因子：
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通讯作者：
C. Genet
中科院分区：
文献类型：
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作者：
Antoine Canaguier;C. Genet
等离子体场通常被认为是非手性的，因为表面等离子体模式的横向磁极化。然而，我们在这里表明，由在光滑金属薄膜上传播的两个相干表面等离子体激元相交而产生的光学晶格可以在干涉近场中产生光学手征。我们特别揭示了与近场手征力的产生有关的等离子体激元势的出现。这为在近场范围内进行对映体分离方案带来了很好的前景。
Plasmonic fields are usually considered non-chiral because of the transverse magnetic polarization of surface plasmon modes. We however show here that an optical lattice created from the intersection of two coherent surface plasmons propagating on a smooth metal film can generate optical chirality in the interfering near field. We reveal in particular the emergence of plasmonic potentials relevant to the generation of near-field chiral forces. This draws promising perspectives for performing enantiomeric separation schemes within the near field.