Superchiral electromagnetic fields created by surface plasmons in nonchiral metallic nanostructures
Superchiral electromagnetic fields created by surface plasmons in nonchiral metallic nanostructures
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DOI：
10.1103/physrevb.87.085405
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发表时间：
2013-02-05
影响因子：
3.7
通讯作者：
Hendry, E.
中科院分区：
文献类型：
--
作者：
Davis, T. J.;Hendry, E.
我们从理论上证明了局部表面等离子体可以产生手性超过圆偏振光50倍的光场。这种超手性光场可以由线偏振光入射到非手性金属结构上形成。我们确定了三种导致大光学手性的机制，涉及入射光和表面等离子体的倏逝场之间的耦合。其中两种机制产生了具有非零平均手性的超手性区域，适合于激发溶液中的手性分子。DOI: 10.1103 / PhysRevB.87.085405
We show theoretically that localized surface plasmons can generate optical fields with a chirality exceeding that of circularly polarized light by a factor of 50. This superchiral optical field can be formed from linearly polarized light incident on nonchiral metal structures. We identify three mechanisms that lead to large optical chirality involving the coupling between the incident light and the evanescent fields of the surface plasmons. Two of these mechanisms create superchiral regions with nonzero average chirality suitable for the excitation of chiral molecules in solution. DOI: 10.1103/PhysRevB.87.085405