Development of novel near-field microspectroscopy and imaging of local excitations and wave functions of nanomaterials
Development of novel near-field microspectroscopy and imaging of local excitations and wave functions of nanomaterials
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新型近场显微光谱学以及纳米材料局部激发和波函数成像的发展
DOI：
10.1246/bcsj.81.659
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发表时间：
2008
影响因子：
4
通讯作者：
H. Okamoto
中科院分区：
文献类型：
--
作者：
K. Imura;H. Okamoto
通过将近场光学显微镜与线性和非线性光学技术相结合，我们开发了近场显微光谱的新方法。研制的近场显微镜实现了高空间分辨率和高时间分辨率，并用于研究单个贵金属纳米粒子的局域激发和波函数。我们证明了等离子体波函数和纳米粒子附近的光场是用近场方法可视化的。基于这些结果，我们清楚地表明，纳米颗粒附近的局域电磁场增强是表面增强光谱中最重要的因素之一。我们还将该方法扩展到超快光学测量，并展示了单根金纳米棒的空间分辨超快瞬变响应。在纳米棒中观察到的特征时空特征是由于纳米棒的光致电子温度升高时等离子体激元模波函数的变化引起的。
We have developed novel methods of near-field microspectroscopy by combining near-field optical microscopy with linear and non-linear optical techniques. The developed near-field microscope achieves high spatial resolution and high time resolution, and is applied to studies of local excitations and wave functions of single noble metal nanoparticles. We demonstrate that the plasmon wave functions and the optical fields in the vicinity of nanoparticles are visualized by the near-field methods. Based on these results, we clearly show that localized electromagnetic field enhancement in the vicinity of nanoparticles is one of the most important factors in surface-enhanced spectroscopies. We also extended the methods to ultrafast optical measurements, and show space-resolved ultrafast transient response of single gold nanorods. The characteristic spatio-temporal features observed in the nanorods are revealed to be arising from the changes of the plasmon-mode wave functions upon elevation of photo-induced electronic temperature of the nanorod.
影响因子：
10.8
作者：
Durr, Nicholas J.;Larson, Timothy;Ben-Yakar, Adela
通讯作者：
Ben-Yakar, Adela