摘要
在强聚焦激光光场中,以射线光学(ray-optics)计算模型为基础,对几何尺寸远大于光波长的米氏球状粒子所受激光微束横向(沿y轴方向)光阱力进行了计算。并且在给定参数条件下,进行了数值仿真,根据仿真结果,讨论了光束束腰半径、激光波长与光阱品质特性的关系。并对血红细胞进行了实验研究,得出了横向光阱力与微粒中心偏离光轴距离的关系曲线,实验结果和理论相一致。
In laser field, based on the theory of geometric optics, the optical trapping force which is in y axis way apply on the micro sphere particles lurid cell in the Mie scattering field is calculated quantitatively. The simulation results under given parameters are described. According to the simulation results, the relations between the optical trapping force and the main parameters of the system, including focus corset radius and the laser wave-length are discussed. And red blood cells were studied, draw the relationship curve between horizontal force and particle deviate from the optical axis, experimental results are accordance with theory.
出处
《激光与红外》
CAS
CSCD
北大核心
2008年第3期208-210,共3页
Laser & Infrared
基金
国家自然科学基金(No.50375138)
国家自然科学基金(No.50575193)资助项目
关键词
光镊
光阱力
束腰半径
血红细胞
optical tweezers
optical trapping force
corset radius
lurid cell
