Surface plasmon modes of a single silver nanorod: an electron energy loss study
Surface plasmon modes of a single silver nanorod: an electron energy loss study
复制标题
DOI：
10.1364/oe.19.015371
复制
发表时间：
2011-08-01
期刊：
影响因子：
3.8
通讯作者：
Midgley, Paul A.
中科院分区：
文献类型：
--
作者：
Nicoletti, Olivia;Wubs, Martijn;Midgley, Paul A.
我们提出了一个电子能量损失的研究，使用能量过滤TEM的空间分辨表面等离子体激元激发的纵横比为14.2的银纳米棒上的30 nm厚的氮化硅膜休息。我们的研究结果表明，激发量子化的共振模式，其强度的最大值变化沿着纳米棒的长度和其波长变得压缩向纳米棒的两端。模拟表面等离子体响应的银纳米棒氮化硅系统的理论计算表明，包括延迟和基板效应的重要性，以准确地描述的共振模式的能量色散。(C)2011年美国光学学会
We present an electron energy loss study using energy filtered TEM of spatially resolved surface plasmon excitations on a silver nanorod of aspect ratio 14.2 resting on a 30 nm thick silicon nitride membrane. Our results show that the excitation is quantized as resonant modes whose intensity maxima vary along the nanorod's length and whose wavelength becomes compressed towards the ends of the nanorod. Theoretical calculations modelling the surface plasmon response of the silver nanorodsilicon nitride system show the importance of including retardation and substrate effects in order to describe accurately the energy dispersion of the resonant modes. (C) 2011 Optical Society of America