Visualization of localized intense optical fields in single gold-nanoparticle assemblies and ultrasensitive Raman active sites
Visualization of localized intense optical fields in single gold-nanoparticle assemblies and ultrasensitive Raman active sites
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DOI：
10.1021/nl061650p
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发表时间：
2006-10-11
期刊：
影响因子：
10.8
通讯作者：
Kitajima, Masahiro
中科院分区：
文献类型：
--
作者：
Imura, Kohei;Okamoto, Hiromi;Kitajima, Masahiro
我们展示了可视化的局部强电磁场在真实的空间中定制的二聚和三聚金纳米球通过使用近场光学技术。利用双光子诱导发光和拉曼测量，我们发现电场被限制在聚集体的间隙位置。我们还演示了三聚体结构中电场局部化位点的光开关操作。
We demonstrate visualization of localized intense electromagnetic fields in real space in well-tailored dimeric and trimeric gold nanospheres by using near-field optical techniques. With two-photon induced luminescence and Raman measurements, we show that the electric field is confined at an interstitial site in the aggregate. We also demonstrate optical switching operations for the electric-field localized sites in the trimer structure.