Radiation Pressure Cooling With Localized Surface Plasmon

使用局域表面等离子体激元的辐射压力冷却

• 批准号: 23656039
• 负责人: SASAKI Keiji
• 金额: $ 2.58万
• 依托单位: Hokkaido University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Challenging Exploratory Research
• 财政年份: 2011
• 资助国家: 日本
• 起止时间: 2011 至 2012
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-23656039/
• 关键词: 放射圧; プラズモン局在場; クーリング; 金属ナノ構造

We have theoretically and experimentally investigated radiation pressure induced by localized surface plasmon (LSP) of metal nano-gap structures, and analyzed the strength and spatial distribution of the optical force exerted on nanometer-sized particles and molecules under thermal motions. We showed that the nanoscale spatial profiles of the LSP fields within the nano-gap exhibit complicated fine structures, rather than single peaks. The nanopatterns are formed by interferences of dipolar, quadrupolar, and higher-order multipolar plasmonic modes. In addition, we developed the measurement system for quantitatively analyzing the radiation pressure exerted on nanoparticles. The experimental results demonstrated that the force strength is enhance by 3 order of magnitude compared to that with conventional far-filed trapping. We also succeeded in observation of two-dimensional trapping potentials, which is the first demonstration of super-resolution optical trapping.

我们从理论上和实验上研究了金属纳米间隙结构的局域表面等离子体（LSP）引起的辐射压力，并分析了热运动下纳米颗粒和分子所受光力的强度和空间分布。我们表明，纳米间隙内 LSP 场的纳米级空间分布表现出复杂的精细结构，而不是单个峰。纳米图案是由偶极、四极和高阶多极等离子体模式的干涉形成的。此外，我们还开发了用于定量分析施加在纳米颗粒上的辐射压力的测量系统。实验结果表明，与传统的远场捕获相比，力强度提高了3个数量级。我们还成功观察到了二维捕获势，这是超分辨率光学捕获的首次演示。

项目成果

Strong field enhancement of periodically-arrayed gap-mode nanoantennas

周期性排列间隙模式纳米天线的强场增强

• 发表时间: 2012
• 作者: 尾松孝茂;森田隆二;K. Sakai
• 通讯作者: K. Sakai

SasakiTemporal response analysis of trap states of single CdSe/ZnS quantum dots on a thin metal substrate

Sasaki 薄金属基底上单个 CdSe/ZnS 量子点陷阱态的时间响应分析

• 发表时间: 2011
• 期刊: Journal of Photochemistry & Photobiology, A: Chemistry
• 作者: H. Fujiwara;H. Ohta;T. Chiba;K
• 通讯作者: K

Efficient optical trapping using small arrays of plasmonic nanoblock pairs

使用等离子体纳米块对的小阵列进行有效的光学捕获

• DOI: 10.1063/1.3675550
• 发表时间: 2012
• 期刊: Applied Physics Letters
• 影响因子: 4
• 作者: Yoshito Tanaka;Keiji Sasaki
• 通讯作者: Keiji Sasaki

Analysis of Trap State Dynamics of Single CdSe/ZnS Quantum Dots on an Indium Tin Oxide Thin Film with Applying External Electric Field

外加电场下氧化铟锡薄膜上单个 CdSe/ZnS 量子点的陷阱态动力学分析

• DOI: 10.1021/jp306408s
• 发表时间: 2013
• 期刊: J. Phys. Chem. C
• 影响因子: 3.7
• 作者: Takashi Chiba;Jun Qi;Hideki Fujiwara;Keiji Sasaki
• 通讯作者: Keiji Sasaki

SasakiLow-threshold and quasi-single-mode random laser within a submicrometer-sized ZnO spherical particle filmApplied

佐佐木亚微米级ZnO球形颗粒薄膜内的低阈值准单模随机激光应用

• 发表时间: 2013
• 期刊: Physics Letters
• 作者: H. Fujiwara;R. Niyuki;Y. Ishikawa;N. Koshizaki;T. Tsuji and K
• 通讯作者: T. Tsuji and K