权益分类	功能权益	普通用户	{{item.name}}会员
{{category.name}}	{{benefitItem.name}}

Development of All Optical, Super Precise manipulator

开发全光学超精密机械手

基本信息

批准号：
05555012
负责人：
SATO Shunichi
金额：
$ 4.29万
依托单位：
Tohoku University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Developmental Scientific Research (B)
财政年份：
1993
资助国家：
日本
起止时间：
1993 至 1994
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-05555012/
关键词：
Laser Manipulator Optical Trapping ヘテロダイン検出

项目摘要

Optical trapping technique, which uses a strongly focused laser beam, has been an important tool for the precise manipulation of micrometer-sized particles such as polystirene latex spheres and biological cells. For these particles, a force generated by refraction at the particle surface is thought to contribute significantly to optical trapping because a large fraction of light is refracted. Therefore, a strongly absorptive particle, which has a large complex index of refraction, has been considered to be difficult to trap optically. We succeeded in trapping three kinds of micrometer-sized metal particles with a fixed, nonscanning laser beam. On the basis of the ray optics, kinetic forces generated by the momentum transmission from the light, is calculated for metal particles. As a result, the facts observed experimentally are well explained with the calculated results. Possibility to trap other materials such as semiconductors is also predicted by the force calculations. This means the optical trapping technique is able to be widely applied in various fields of basic and applied studies.Furthermore, we performed a basic experiments of an optical hererodyne interferometry, which has spatial resolution of nanometer. It is thought that a basic technology for all optical, precise manipulator is established by combining the optical trapping and the heterodyne interferometry techniques.

利用强聚焦激光束的光阱技术已成为对聚苯乙烯乳胶球、生物细胞等微米级粒子进行精密操作的重要手段。对于这些颗粒，在颗粒表面由折射产生的力被认为对光学捕获有显著贡献，因为大部分光被折射。因此，具有大的复折射率的强吸收颗粒被认为是难以光学捕获的。我们成功地用固定的非扫描激光束捕获了三种微米级的金属颗粒。根据射线光学理论，计算了金属粒子在光的动量传递作用下所受的动力。结果表明，计算结果很好地解释了实验观测到的现象。力的计算也预测了捕获其他材料如半导体的可能性。这意味着光阱技术可以广泛地应用于基础和应用研究的各个领域。此外，我们还进行了具有纳米级空间分辨率的光外差干涉测量的基础实验。将光阱技术与外差干涉技术相结合，为全光精密机械手的研制奠定了基础。