Optical scattering resonances of single and coupled dimer plasmonic nanoantennas
Optical scattering resonances of single and coupled dimer plasmonic nanoantennas
复制标题
DOI：
10.1364/oe.15.017736
复制
发表时间：
2007-12-24
期刊：
影响因子：
3.8
通讯作者：
Rivas, J. Gomez
中科院分区：
文献类型：
--
作者：
Muskens, O. L.;Giannini, V.;Rivas, J. Gomez
利用共焦暗场光谱研究了单个等离子体二聚体天线的光学共振。具有不同的臂长和粒子间的间隙大小的天线阵列上的实验表明，由于几何共振和等离子体激元杂交的组合的等离子体激元模式的大的光谱位移。耦合二聚体天线的共振是相当宽的那些相比，单个纳米棒，这是由于耦合天线模式的超辐射阻尼。的散射光谱进行了比较与电动模型计算，证明了近场和远场特性的半波天线。(c)2007年，美国光学学会。
The optical resonances of individual plasmonic dimer antennas are investigated using confocal darkfield spectroscopy. Experiments on an array of antennas with varying arm lengths and interparticle gap sizes show large spectral shifts of the plasmon modes due to a combination of geometrical resonances and plasmon hybridization. The resonances of the coupled-dimer antennas are considerably broadened compared to those of single nanorods, which is attributed to a superradiant damping of the coupled antenna modes. The scattering spectra are compared with electrodynamic model calculations that demonstrate both the near-field and far-field characteristics of a half-wave antenna. (c) 2007 Optical Society of America.