近轴圆对称光束的角动量及其应用  

Angular Momentums of Paraxial and Cylindrical Symmetric Beams and Their Applications

作　　者：倪赟[1] 印建平[1,2] 

机构地区：[1]苏州大学理学院物理系 [2]华东师范大学物理系,光谱学与波谱学教育部重点实验室,上海200062

出　　处：《量子电子学报》2003年第2期135-146,共12页Chinese Journal of Quantum Electronics

基　　金：国家自然科学基金(批准号:69878019和10174050);江苏省自然科学基金(批准号:DK97139);江苏省教育厅自然科学重点基金(批准号:00KJB140001);江苏省青蓝工程新世纪学术带头人培养基金资助。

摘　　要：本文简单介绍了光场角动量的基本定义与概念,各类圆对称光束的角动量。同时,光束角动量能通过π/2模式转换器产生,由此修正光束的位相结构。光的吸收可以同时导致光束的自旋角动量或轨道角动量转移给微米粒子,就像光学镊子一样引起粒子的转动,从而形成光学扳手。另外,简单介绍了圆对称光束作为光学镊子和光学扳手在微米粒子和生物细胞的光学导引、囚禁与操控等领域中的应用。An introduction is given to the basic definition and conception of the angular momentums of the light field, and the angular momentums of a variety of cylindrical symmetric beams. At the same time, angular momentum may be produced by use of a π/2 mode converter, which modifies the phase structure of the beam. Absorption of the light allows both the spin and orbital angular momentum of a light beam to be transferred to microscopic particles held within optical tweezers, forming an optical spanner. In addition, as optical tweezers and spanners, the potential applications of cylindrical symmetric beams in optical guiding, traps, manipulations and controls of microscopic particles and biological cells are briefly discussed.

关 键 词：圆对称光束 角动量 光学镊子 光学扳手 光场 应用 

分 类 号：O431.2[机械工程—光学工程]