粒子在双涡旋光束中的受力特性

TRANSVERSE TRAPPING FORCE ACTED ON A SPHERICAL ABSORBING PARTICLE IN AIR WITH A DUAL -VORTEX OPTICAL TRAP

从理论上分析了空气中的球形吸收粒子在舣涡旋光束中的受力特性，分别从径向和横向两个方向分析了粒子的受力情况，估算了粒子在双涡旋光束中所受的径向力随粒子半径与光腰半径的比值、衍射距离的变化关系，以及粒子所受横向力与涡旋光束环半径的关系，估算了捕获粒子的最大径向力和横向力．

We calculate both longitudinal and transverse forces acting on a spherical absorbing particle in air with a dual -vortex optical trap. The relationship between the radius of the particle by dual - vortex optical trap and longitudinal forces was calculated theoretically. We analyze the condition of the beam waist and the diffraction length with the longitudinal force. The relationship between of the ring radius of the beam and transverse forces was numerically calculated. Through the analysis, we obtain the maximum transverse forces when the ratio of the radius of the particle and the ring radius of the beam is constant.