Visualizing the Optical Interaction Tensor of a Gold Nanoparticle Pair
Visualizing the Optical Interaction Tensor of a Gold Nanoparticle Pair
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DOI：
10.1021/nl9037505
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发表时间：
2010-02-01
期刊：
影响因子：
10.8
通讯作者：
Novotny, Lukas
中科院分区：
文献类型：
--
作者：
Deutsch, Bradley;Hillenbrand, Rainer;Novotny, Lukas
在纳米尺度上控制光场是等离子体激元学和纳米光子学的中心主题。表征局部光场分布的方法是必要的，以验证理论预测，测试纳米加工程序，并为设计改进提供反馈。探测近场的典型方法（例如，单分子荧光和近场显微术）不能探测场分布的复值和矢量性质。我们证明，与各向同性的偏振性结合的激发和检测光束的偏振控制的纳米粒子探针提供访问。这个信息通过交互审查。对于由单个纳米颗粒组成的样品，我们表明，记录的图像对应于耦合探针和样品的本地绿色函数审查员元素的地图。相互作用纳米粒子的监察映射对于光学传感、光学天线、表面增强拉曼散射、非线性光学和分子标尺等都有重要意义。
The control of optical fields on the nanometer scale is a central theme of plasmonics and nanophotonics. Methods for characterizing localized optical Field distributions are necessary to validate theoretical predictions, to test nanofabrication procedures, and to provide feedback for design improvements. Typical methods of probing near fields (e,g., single molecule Fluorescence and near-field microscopy) cannot probe both the complex-valued and vectorial nature of the field distributions. We demonstrate that a nanoparticle probe with isotropic polarizability in combination with polarization control of excitation and detection beams provides access to. this information through the interaction censor. For a sample consisting of a single nanoparticle we show that the recorded images correspond to maps of the local Green's function censor elements that couple the probe and sample. The censorial mapping of interacting nanciparticles is of interest for optical sensing, optical antennas, surface-enhanced Raman scattering, nonlinear optics, and molecular rulers.