Light-Bending Nanoparticles
Light-Bending Nanoparticles
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DOI：
10.1021/nl900208z
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发表时间：
2009-03-01
期刊：
影响因子：
10.8
通讯作者：
Halas, Naomi J.
中科院分区：
文献类型：
--
作者：
Mirin, Nikolay A.;Halas, Naomi J.
金属纳米结构与其几何形状相关的光学共振是一个强烈的当前兴趣的主题，因为它们能够以传统光学材料不可能的方式操纵光。这些系统的一个特别迷人的方面是最近实现的可能性，创造光频“磁等离子体”响应的幅度相当的“电等离子体”的响应。在这里，我们表明，Au nanocups在其磁感应共振具有独特的能力，重新定向散射光在一个方向依赖于杯的取向，作为一个真正的三维纳米天线。
Metallic nanostructures with their geometry-dependent optical resonances are a topic of intense current Interest due to their ability to manipulate light in ways not possible with conventional optical materials. A particularly fascinating aspect of these systems Is the recently realized possibility of creating optical frequency "magnetic plasmon" responses of comparable magnitude to the "electric plasmon" response. Here we show that Au nanocups at their magnetoinductive resonance have the unique ability to redirect scattered light In a direction dependent on cup orientation, as a true three-dimensional nanoantenna.