光子角动量及其应用前景

Photon Angular Momentum and its Perspectives

本文简单介绍了光场角动量的基本概念。概括了具有轨道角动量的特殊光束-高斯拉盖尔光束的特点及产生方式,在其产生过程中总结出带角动量的光束和物质相互作用时角动量发生转移。给出了不具有螺旋相位结构却有轨道角动量的椭圆光束。这些带有角动量的光束与微米粒子相互作用时所产生的微小的力可以起到对微米粒子的囚禁和旋转作用,这就为生物细胞的光学导引、囚禁与操控领域提供了广阔应用前景。

An introduction is given to the basic definition of the angular momentums of the light field.This paper Generalizes the characteristic of Laguerre-Gaussian beam which in possession of orbital angular momentum and conclude that angular momentum are transferred from light beam to matter.At the same time,elliptical Gaussian beam,which have orbital angular momentum but have no spiral phase is introduced.Minuteness force is produced when these beams and microparticle interact,the minuteness force is enough to trape and rotate microparticle,which provide wider application perspective in optical guiding,traps and manipulations.