Experimental observation of narrow surface plasmon resonances in gold nanoparticle arrays
Experimental observation of narrow surface plasmon resonances in gold nanoparticle arrays
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DOI：
10.1063/1.3012365
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发表时间：
2008-11-03
影响因子：
4
通讯作者：
Crozier, Kenneth B.
中科院分区：
文献类型：
--
作者：
Chu, Yizhuo;Schonbrun, Ethan;Crozier, Kenneth B.
我们表明，光栅衍射和局域表面等离子体激元在水中的二维金纳米粒子阵列之间的耦合导致窄的近红外共振峰在测量的远场消光光谱。在时域有限差分（FDTD）计算和实验消光谱之间获得了良好的协议。FDTD计算预测，金纳米颗粒阵列表现出近场电场强度（E（2））增强约一个数量级大于那些单个孤立的金纳米颗粒。
We demonstrate that coupling between grating diffraction and localized surface plasmons in two-dimensional gold nanoparticle arrays in water leads to narrow near-infrared resonance peaks in measured far field extinction spectra. Good agreement is obtained between finite difference time domain (FDTD) calculations and experimental extinction spectra. The FDTD calculations predict that the gold nanoparticle arrays exhibit near-field electric field intensity (E(2)) enhancements approximately one order of magnitude greater than those of single isolated gold nanoparticles.