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.

本文从理论和实验两方面研究了金属纳米间隙结构中局域表面等离子体激元（LSP）产生的辐射压力，分析了热运动下作用于纳米粒子和分子的光动力的强度和空间分布。我们发现，在纳米间隙内的LSP场的纳米尺度空间分布表现出复杂的精细结构，而不是单峰。纳米粒子由偶极、四极和高阶多极等离子体激元模式的干涉形成。此外，我们开发了测量系统，用于定量分析施加在纳米颗粒上的辐射压力。实验结果表明，与传统远场捕获相比，该力强度提高了3个数量级。我们还成功地观测到了二维囚禁势，这是超分辨光学囚禁的首次演示。

项目成果

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

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

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