窒素空孔中心ダイヤモンドを用いたメタマテリアルのナノスケール磁場計測と特性評価

使用氮空位中心金刚石对超材料进行纳米级磁场测量和表征

• 批准号: 16F16066
• 负责人: 田中 拓男
• 金额: $ 1.47万
• 依托单位: Institute of Physical and Chemical Research
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for JSPS Fellows
• 财政年份: 2016
• 资助国家: 日本
• 起止时间: 2016-04-22 至 2018-03-31
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-16F16066/
• 关键词: 反射分光法; 電磁場モデリング; 走査プローブ顕微鏡; 近接場; メタマテリアル

To maintain high stability of scanning probe microscope in room temperature, a compact and rigid SPM system based on a scanning tunneling microscope (STM) was designed and constructed. The new optics for illumination and detection were based on a fiber coupled system, which is useful for easy alignment. Beam splitters with varying reflectance and transmittance ratios were used to increase detection sensitivity. Through this environment control chamber, 3 kinds of environments in room temperature are possible: (1) ambient air, (2) nitrogen purged, and (3) low-vacuum (~10 Pa). With this multi-environment system, it will be easier to study samples that are sensitive to the local environment.The unexpected result of this work is attaining subnanometer resolution of 0.6 nm using the developed environment controlled SPM system while conducting Raman experiments to test the detection efficiency of the system. From this result, it can also be assumed that the same high resolution that was observed for the electric field can also be observed when probing the magnetic field. Such high resolution is beneficial in studying nanosized metamaterial structures, especially at the edges of the structures where light tends to concentrate itself and generates hot spots.

为了保持扫描探针显微镜在室温下的高稳定性，设计并构建了一种基于扫描隧道显微镜（STM）的紧凑且刚性的SPM系统。用于照明和检测的新光学器件基于光纤耦合系统，这对于轻松对准非常有用。使用具有不同反射率和透射率比率的分束器来提高检测灵敏度。通过该环境控制室，可以实现3种室温环境：（1）环境空气，（2）氮气吹扫，以及（3）低真空（~10 Pa）。有了这个多环境系统，将更容易研究对局部环境敏感的样品。这项工作的意想不到的结果是使用开发的环境控制SPM系统获得了0.6 nm的亚纳米分辨率，同时进行拉曼实验来测试检测系统的效率。从该结果还可以假设，在探测磁场时也可以观察到与电场观察到的相同高分辨率。如此高分辨率有利于研究纳米级超材料结构，特别是在光倾向于集中并产生热点的结构边缘。

项目成果

Temperature Determination at the Nanoscale via Tip-enhanced THz-Raman Spectroscopy

通过尖端增强太赫兹拉曼光谱测定纳米级温度

• 发表时间: 2016
• 作者: M. Balois N. Hayazawa F. Catalan S. Kawata T. Tanaka T. Yano T. Hayashi