Active Control of Chiral Optical near Fields on a Single Metal Nanorod
Active Control of Chiral Optical near Fields on a Single Metal Nanorod
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DOI：
10.1021/acsphotonics.8b01500
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发表时间：
2019-01
期刊：
影响因子：
7
通讯作者：
S. Hashiyada;T. Narushima;H. Okamoto
中科院分区：
文献类型：
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作者：
S. Hashiyada;T. Narushima;H. Okamoto
以圆偏振光为代表的手性光场在纳米尺度上增强了手性光-物质相互作用，具有新的应用前景。这一特性使得一种超灵敏的手性分子表征方法得以发展，并通过全光方法实现了纳米级磁控制，以互连自旋电子纳米光学器件。具有可切换手性或可控制手性的局部手性光源对于构建此类实际应用是必不可少的。在目前主要用于局部手性光产生的方法中，光的手性是由纳米材料的手性控制的，当我们需要改变光的手性时，这是不方便的。我们利用非手性金纳米棒和非手性线偏振光场的组合，实验实现了高手性局部光场的产生和主动控制。通过倾斜入射的方位角…
Chiral optical fields (typified by circularly polarized light) localized on the nanoscale enhance the chiral light–matter interaction, which may provide novel potential applications. This property enables the development of an ultrasensitive method for characterization of chiral molecules and nanoscale magnetic control realized by an all-optical method to interconnect spintronic nano-optical devices. A local chiral light source with switchable handedness or controllable chirality is indispensable for building such applications for practical use. In the current major method used for local chiral light generation, the handedness of the light is controlled by the handedness of the nanomaterial, which is not convenient when we need to change the handedness of the light. We experimentally achieve here generation and active control of a highly chiral local optical field by using a combination of an achiral gold nanorod and achiral linearly polarized optical field. By tilting the azimuth angle for the incident l...