摘要
基于偏振光波是左旋光子与右旋光子组成的,从广义米理论出发,得出了偏振高斯波束对球形粒子的辐射俘获力和力矩的表示式.分析了微粒在圆偏振高斯波束照射时产生两种不同旋转的原因,并结合光子的量子特性进行了解释.对圆偏振高斯波束中粒子的两种力矩进行了数值模拟,讨论了粒子半径、折射率、吸收系数和束腰半径对力矩及光致旋转的影响.
Based on the fact that the polarized beam is composed of L-photon and D-photon,the expressions of the radiation trapping forces and torques of spherical particle exerted by polarized Gaussian beam are obtained in the framework of the generalized Lorenz-Mie theory. The reasons of the two different rotations of particles driven by circularly polarized Gaussian beam are analyzed and explained in combination with the quantum properties of photon. Then numerical simulations are performed for the two kinds of torques acted on the particles by polarized Gaussian beam,and the effects on the torques and optically driven rotations of the radius,relative refractive index,absorbing coefficient of the particle and waist radius of the beam are discussed.
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
2011年第2期779-785,共7页
Acta Physica Sinica
基金
国家自然科学基金(批准号:60771039)
内蒙古工业大学科研基金(批准号:X200721)资助的课题~~
关键词
光致旋转
力矩
高斯波束
光子
optically driven rotation
optical torque
Gaussian beam
photon
