Nanoscale chemical mapping using three-dimensional adiabatic compression of surface plasmon polaritons
Nanoscale chemical mapping using three-dimensional adiabatic compression of surface plasmon polaritons
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DOI：
10.1038/nnano.2009.348
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发表时间：
2010-01-01
影响因子：
38.3
通讯作者：
Di Fabrizio, Enzo
中科院分区：
文献类型：
--
作者：
De Angelis, Francesco;Das, Gobind;Di Fabrizio, Enzo
等离子体激元学、拉曼光谱学和原子力显微镜的领域最近经历了相当大的发展，但彼此独立。通过结合这些技术，可以在单个分子水平上同时获得一系列互补信息。在这里，我们报告的设计，制造和应用的光子等离子体激元器件，是完全兼容的原子力显微镜和拉曼光谱。我们的方法依赖于表面等离子体激元的产生和本地化的绝热压缩通过金属锥形波导创建强烈增强的拉曼激发在一个区域内只有几个纳米。锥形波导也可以用作原子力显微镜的尖端。使用该装置，可以获得关于硅纳米晶体的形貌、化学和结构信息，空间分辨率为7nm。
The fields of plasmonics, Raman spectroscopy and atomic force microscopy have recently undergone considerable development, but independently of one another. By combining these techniques, a range of complementary information could be simultaneously obtained at a single molecule level. Here, we report the design, fabrication and application of a photonic-plasmonic device that is fully compatible with atomic force microscopy and Raman spectroscopy. Our approach relies on the generation and localization of surface plasmon polaritons by means of adiabatic compression through a metallic tapered waveguide to create strongly enhanced Raman excitation in a region just a few nanometres across. The tapered waveguide can also be used as an atomic force microscope tip. Using the device, topographic, chemical and structural information about silicon nanocrystals may be obtained with a spatial resolution of 7 nm.