Sensitivity of collective plasmon modes of gold nanoresonators to local environment
Sensitivity of collective plasmon modes of gold nanoresonators to local environment
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DOI：
10.1364/ol.35.000956
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发表时间：
2010-04-01
期刊：
影响因子：
3.6
通讯作者：
Grigorenko, A. N.
中科院分区：
文献类型：
--
作者：
Kravets, V. G.;Schedin, F.;Grigorenko, A. N.
我们提出了我们认为是第一个实验研究的光学响应的集体等离子体共振在规则的纳米阵列共振器到当地环境。最近观察到的集体等离子体激元模式出现，由于衍射耦合的局域等离子体激元和产量几乎1个数量级的改善共振质量。我们测量这些模式的气体和液体介质的折射率的微小变化的响应。我们表明，集体共振的相位灵敏度可以比相同纳米点阵列的最佳振幅灵敏度好2个数量级以上，并且比表面等离子体共振传感器的相位灵敏度好1个数量级。(C)2010年美国光学学会
We present what we believe to be the first experimental study of the optical response of collective plasmon resonances in regular arrays of nanoresonators to local environment. Recently observed collective plasmon modes arise due to diffractive coupling of localized plasmons and yield almost 1 order of magnitude improvement in resonance quality. We measure the response of these modes to tiny variations of the refractive index of both gaseous and liquid media. We show that the phase sensitivity of the collective resonances can be more than 2 orders of magnitude better than the best amplitude sensitivity of the same nanodot array as well as 1 order of magnitude better than the phase sensitivity in surface plasmon resonance sensors. (C) 2010 Optical Society of America