Direct measurement of dispersion relation for surface plasmon-polaritons on silver nanoantennas.
Direct measurement of dispersion relation for surface plasmon-polaritons on silver nanoantennas.
复制标题
直接测量银纳米天线上表面等离子体激元的色散关系。
DOI：
10.1093/jmicro/dft048
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发表时间：
2014
期刊：
影响因子：
1.8
通讯作者：
H. Kurata
中科院分区：
文献类型：
--
作者：
H. Saito;H. Kurata
我们研究了在银纳米天线上激发的表面等离子体激元极化激元的色散关系依赖于长度的程度。为了实现这一点，使用角分辨电子能量损失谱（AREELS）和空间分辨电子能量损失谱（SREELS）对长度为220 nm至2.5 μm的单个银纳米天线进行色散测量。AREELS能够测量延伸到2.5 μ m长的银纳米天线的2.6 eV高能区域的色散关系，而不需要激发法布里-珀罗型共振。我们的实验表明，具有相同直径的银纳米天线的色散关系是独立于它们各自的长度。
We investigated the degree to which the dispersion relation of surface plasmon-polaritons excited on silver nanoantennas depends on length. To accomplish this, dispersion measurements for individual silver nanoantennas with lengths from 220 nm to 2.5 μm were performed using angle-resolved electron energy-loss spectroscopy (AREELS) and spatially resolved EELS (SREELS). AREELS enabled measurements of the dispersion relation extending into the high-energy region of 2.6 eV for a 2.5-μm-long silver nanoantenna, without the need to excite Fabry-Perot-type resonances. Our experiments showed that the dispersion relation of silver nanoantennas that have the same diameter is independent of their individual lengths.