Optically induced rotation of Rayleigh particles by arbitrary photonic spin  

作　　者：GUANGHAO RUI YING LI SICHAO ZHOU YUSONG WANG BING GU YIPING CUI QIWEN ZHAN 

机构地区：[1]Advanced Photonics Center, Southeast University [2]Department of Electro-Optics and Photonics, University of Dayton [3]School of Optical-Electrical and Computer Engineering, University of Shanghai for Science and Technology

出　　处：《Photonics Research》2019年第1期69-79,共11页光子学研究（英文版）

基　　金：National Natural Science Foundation of China(NSFC)(11504049,11474052,11774055);Natural Science Foundation of Jiangsu Province,China(BK20150593);National Key Basic Research Program of China(2015CB352002)

摘　　要：Optical trapping techniques hold great interest for their advantages that enable direct handling of nanoparticles. In this work, we study the optical trapping effects of a diffraction-limited focal field possessing an arbitrary photonic spin and propose a convenient method to manipulate the movement behavior of the trapped nanoparticles. In order to achieve controllable spin axis orientation and ellipticity of the tightly focused beam in three dimensions, an efficient method to analytically calculate and experimentally generate complex optical fields at the pupil plane of a high numerical aperture lens is developed. By numerically calculating the optical forces and torques of Rayleigh particles with spherical/ellipsoidal shape, we demonstrate that the interactions between the tunable photonic spin and nanoparticles lead to not only 3D trapping but also precise control of the nanoparticles' movements in terms of stable orientation, rotational orientation, and rotation frequency. This versatile trapping method may open up new avenues for optical trapping and their applications in various scientific fields.Optical trapping techniques hold great interest for their advantages that enable direct handling of nanoparticles. In this work, we study the optical trapping effects of a diffraction-limited focal field possessing an arbitrary photonic spin and propose a convenient method to manipulate the movement behavior of the trapped nanoparticles. In order to achieve controllable spin axis orientation and ellipticity of the tightly focused beam in three dimensions, an efficient method to analytically calculate and experimentally generate complex optical fields at the pupil plane of a high numerical aperture lens is developed. By numerically calculating the optical forces and torques of Rayleigh particles with spherical/ellipsoidal shape, we demonstrate that the interactions between the tunable photonic spin and nanoparticles lead to not only 3D trapping but also precise control of the nanoparticles' movements in terms of stable orientation, rotational orientation, and rotation frequency. This versatile trapping method may open up new avenues for optical trapping and their applications in various scientific fields.

关 键 词：Optical TRAPPING techniques field possessing tunable PHOTONIC 

分 类 号：O4[理学—物理]