Comparison of near- and far-field measures for plasmon resonance of metallic nanoparticles
Comparison of near- and far-field measures for plasmon resonance of metallic nanoparticles
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DOI：
10.1364/ol.34.000896
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发表时间：
2009-04-01
期刊：
影响因子：
3.6
通讯作者：
Lee, Luke P.
中科院分区：
文献类型：
--
作者：
Ross, Benjamin M.;Lee, Luke P.
与系统的近场和远场等离子体共振的措施的比较，我们表明，金和银球形粒子的措施之间出现显着差异。近场和远场测量之间的峰值波长的差异随着颗粒尺寸的增加而增加，对于金和银两者，对于100 nm的颗粒半径达到超过200 nm。我们物理上解释这些结果，通过应用辐射阻尼准静态近似，我们提供了简单的唯象拟合，很容易转换的峰值波长之间的每一个措施。我们希望考虑到这些差异可以提供理解和优化表面增强光谱的改进。(C)2009年美国光学学会
With a systematic comparison of the near- and far-field measures of plasmon resonance, we show that significant differences arise between the measures for both gold and silver spherical particles. The difference of the peak wavelengths between the near- and far-field measures increases with increasing particle size, reaching over 200 nm for a particle radius of 100 nm for both gold and silver. We physically explain these results by applying radiation damping to the quasi-static approximation, and we provide simple phenomenonological fits, which readily convert between the peak wavelengths for each measure. We expect that taking into account these differences can provide improvement in understanding and optimizing surface-enhanced spectroscopies. (C) 2009 Optical Society of America