Oscillations of absorbing particles at the water-air interface induced by laser tweezers

被引：16
|
作者：
Zhong, Min-Cheng [1 ]
Wang, Zi-Qiang [2 ]
Li, Yin-Mei [2 ]
机构：
[1] Hefei Univ Technol, Sch Instrument Sci & Optoelect Engn, Hefei 230009, Anhui, Peoples R China
[2] Univ Sci & Technol China, Dept Opt & Opt Engn, Hefei 230026, Anhui, Peoples R China
来源：
OPTICS EXPRESS | 2017年 / 25卷 / 03期
基金：
中国国家自然科学基金;
关键词：
FORCE OPTICAL TRAP; RED-BLOOD-CELLS; DIELECTRIC PARTICLES; LIVING ANIMALS; GRADIENT; MANIPULATION; FLOW; MICROPARTICLES; NANOPARTICLES;
D O I：
10.1364/OE.25.002481
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We present an experimental study on oscillation of absorbing particles at the water-air interface. The oscillation is induced by laser tweezers, which are generated with a high numerical aperture objective. When the laser beam is tightly focused at the water-air interface, the optical gradient force attracts the particles to the spot center, and the laser heating of particles results in a strong thermal gradient that drives the particles to leave the spot center. Under the action of thermal and optical gradient force together, the absorbing particles oscillate at the water-air interface. (C) 2017 Optical Society of America.
引用
收藏
页码：2481 / 2488
页数：8
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