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Development of microscopic and manipulating system in the optical near filed by evanescent photon force

倏逝光子力光学近场显微及操控系统的研制

基本信息

批准号：
12450026
负责人：
UMEDA Norihiro
金额：
$ 5.25万
依托单位：
Tokyo University of Agriculture and Technology
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2000
资助国家：
日本
起止时间：
2000 至 2002
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-12450026/
关键词：
Evanescent wave Photon force Manipulator Near-field optics Position control Optical fiber Metal nano-particle Trapping and manipulation マニピュレーター 2次元エバネッセントフォント力超解像

项目摘要

This research was focused on evanescent photon force, which exists at border of optical interface, in order to observe and manipulate a particle and a biological sample, and following results were obtained.1. As an optical fiber manipulator, the method of gluing a latex ball with a diameter of 10 μm on optical fiber end was devised. In order to clarify an optimum optical system, an exiting beam pattern from the manipulator was calculated using electromagnetic field analysis by FDTD method, and the structure was designed in order to realize a manipulation and trapping of particle.2. When the YAG laser light (wavelength of 1.06 μm) was incident on the fabricated optical manipulator, and a particle was possible to trap and manipulate in water. Especially, it was shown clearly that a gold particle with a diameter of 40nm was able to be trapped and manipulated, and we succeeded in arranging two or more particles.3. The gold particle with a diameter of 100nm was made to fix at the apex of ball lens used in the optical fiber manipulator, and the scattering of an evanescent light was observed successfully.4. Two opposite laser beams were incident on the prism by the incidence angle beyond a critical angle, and the evanescent photon forces for reverse direction were given to the particle on the surface of a prism. We succeeded in positioning a particle with a diameter of about 10 μm at the speed of a few tens of micrometers per second by adjusting laser intensity.5. As a new technology of positioning for the small object with non-contacting and non-destruction manner, the method by evanescent photon force was developed and it was shown that the position of latex sphere of 20 μm in diameter was controllable in a two-dimensional plane.

本研究主要针对光学界面边界存在的倏逝光子力进行研究，以实现对粒子和生物样品的观察和操纵，取得了以下成果： 1．作为光纤机械手，设计了在光纤端部粘贴直径10μm的乳胶球的方法。为了明确最佳的光学系统，利用时域有限差分法(FDTD)进行电磁场分析，计算了机械手的出射光束方向图，并设计了机械手的结构，以实现对粒子的操纵和捕获。 2．当YAG激光（波长1.06μm）入射到所制造的光学操纵器上时，可以在水中捕获和操纵粒子。特别是，清楚地表明直径为40nm的金颗粒能够被捕获和操纵，并且我们成功地排列了两个或多个颗粒。 3．将直径为100nm的金粒子固定在光纤机械臂球透镜的顶端，成功地观察到了倏逝光的散射现象。 4．两束相反的激光束以超过临界角的入射角入射到棱镜上，对棱镜表面的粒子施加相反方向的倏逝光子力。通过调整激光强度，我们成功地以每秒几十微米的速度定位了直径约10微米的颗粒。5．作为一种非接触、非破坏性小物体定位新技术，发展了倏逝光子力定位方法，并证明直径20 μm的乳胶球在二维平面内位置可控。