MEASUREMENT AND CONTROL OF OPTICALLY INDUCED ROTATION OF ANISOTROPIC SHAPED PARTICLES

被引：20

作者：

YAMAMOTO, A

YAMAGUCHI, I

机构：

[1] Optical Engineering Laboratory, The Institute of Physical and Chemical Research (RIKEN), Saitama, 351-01

来源：

JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS | 1995年 / 34卷 / 6A期

关键词：

OPTICAL TRAPPING; OPTICAL MANIPULATION; OPTICAL TWEEZERS; OPTICAL MEASUREMENT; OPTICAL CONTROL;

D O I：

10.1143/JJAP.34.3104

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

When a particle of anisotropic shape is trapped by a laser beam, it generally begins to rotate around itself. This self-rotation is caused by the torque resulting from total forces acting on the particle surface. We have measured the rotation rate rapidly and automatically from temporal variation of light scattered from the rotating particle. The rotation rate, which could be measured up to 2200 rpm, has been shown to be linearly dependent on the power of the trapping beam. We controlled the rotation rate by a feedback loop connecting the measured rotation rate and the trapping beam power.

引用

页码：3104 / 3108

页数：5

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