Development of manipulation technique of metal nanoparticles for plasmonics

等离激元金属纳米粒子操控技术的发展

基本信息

批准号：
15310097
负责人：
MIYAZAKI Hideki
金额：
$ 5.06万
依托单位：
National Institute for Materials Science
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2003
资助国家：
日本
起止时间：
2003 至 2004
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-15310097/
关键词：
micromanipulation scanning electron microscope plasmon

项目摘要

The aim of this project was to establish a technique to fabricate plasmon resonance structures by moving metallic nanoparticles by use of micromanipulation in a scanning electron microscope.In the first year, the feasibility of plasmon resonance structures by manipulation technique was confirmed. Silver microspheres of 100 nm diameter were arranged into dieters with quartz probes with a tip radius of 20-30 nm. These dimers showed red scattering peaks for long-axis polarization. These peaks were identified as anti-symmetric bonding mode of dipolar scattering resonance modes excited in individual spheres. However, we encountered a serious problem that the resonance properties are affected by the SEM observation. This is caused by the deposition of contamination materials by electron beam irradiation, which forced us to change the original research plan.On the other hand, we succeeded in discovering new types of plasmon resonance structures which do not require micromanipulation technique … More s to obtain nanometric gap, as a result of systematic theoretical calculation. Therefore, in the second year, we focused on establishing the designing method of the new structures, and investigate their plasmon resonance properties. The new findings was that the plasmon resonance in closely neighboring metallic nanoparticles is regarded as the Fabry-Perot resonance of two-dimensional lightwave propagating in metal-clad/dielectric-core waveguides by the reflection at the open ends. In short, the important point is the realization of metal-clad waveguide with a finite cavity length rather than the mechanical arrangement of particles with a nanometric gap by use of micromanipulation technique. Gold/silica(thickness D=1.7-56nm)/gold multilayers were deposited on fused silica substrates, and at their edges rectangular cavity resonators of 3-micrometer width and L-nanometer length (L=55-495nm) were fabricated by removing their circumferential areas by ion beam milling. As has been predicted by theoretical calculation, the blue shifting of reflection dips was observed as the cavity length decreases. Less

该项目的目的是建立一种通过在扫描电子显微镜中使用显微镜移动金属纳米颗粒来建立等离子金属纳米颗粒的技术。在第一年，通过操纵技术确认了等离子体共振结构的可行性。将直径为100 nm的银微球排列到节食剂中，具有20-30 nm的尖端半径的石英问题。这些二聚体显示长轴极化的红色散射峰。这些峰被确定为在各个球体中激发的偶极散射共振模式的抗对称键合模式。但是，我们遇到了一个严重的问题，即共振属性受到SEM观察的影响。这是由电子束辐射对污染材料的沉积引起的，这迫使我们改变了原始的研究计划。另一方面，我们成功地发现了不需要微观渗透技术的新型等离子体共振结构……由于系统理论计算的结果，更多的S来获得纳米差距。因此，在第二年，我们专注于建立新结构的设计方法，并研究其等离子体共振属性。新的发现是，在近距离的金属纳米颗粒中，等离子元素的共振被认为是二维灯光的Fabry-Perot共振，在开放端通过反射在金属覆盖/介电/介电核中传播。简而言之，重要的一点是实现具有有限腔长度的金属粘性波导，而不是通过使用微观渗透技术的纳米间隙的颗粒的机械排列。金/二氧化硅（厚度d = 1.7-56nm）/黄金多层沉积在融合的二氧化硅底物上，在其边缘，在其边缘的矩形腔谐振器3微米宽度和L纳米仪长度（L = 55-495nm）的边缘腔谐振器通过离子梁铣削来拆卸其周围区域。正如理论计算所预测的那样，随着腔长的降低，观察到反射倾角的蓝色移动。较少的