Enhanced plasmon coupling in crossed dielectric/metal nanowire composite geometries and applications to surface-enhanced Raman spectroscopy
Enhanced plasmon coupling in crossed dielectric/metal nanowire composite geometries and applications to surface-enhanced Raman spectroscopy
复制标题
DOI：
10.1063/1.2709996
复制
发表时间：
2007-02-26
影响因子：
4
通讯作者：
Ancona, M. G.
中科院分区：
文献类型：
--
作者：
Prokes, S. M.;Glembocki, O. J.;Ancona, M. G.
对Ga2O3/Ag和ZnO/Ag纳米线进行了表面增强拉曼光谱（SERS）分析。结果表明，排列在交叉几何结构中的纳米线具有较高的SERS灵敏度（接近0.2 pg）。这是由于电介质芯/金属壳结构，以及纳米线交叉，这是非常高的电场区域。对两根交叉线附近电场的有限元模拟证实，在交叉线附近有一种增强的等离子体共振，这种共振在交叉线和纳米线周围的空间上延伸。(c) 2007年美国物理学会。
Surface-enhanced Raman spectroscopy (SERS) was performed on Ga2O3/Ag and ZnO/Ag nanowires, which were arranged in either a crossover or noncrossing geometry. Results indicate a high SERS sensitivity (near 0.2 pg) for nanowires arranged in a crossing geometry. It is suggested that this is due to the dielectric core/metal shell structure, as well as to the nanowire crossings, which are regions of very high electric fields. Finite element simulations of the electric field near two crossed wires confirm an enhanced plasmon resonance in the vicinity of the crossing, which extends spatially in the crossings and around the nanowires. (c) 2007 American Institute of Physics.