CAJ | 학술논문

应用部分相干理论推导了部分相干贝塞尔涡旋光束经过透镜聚焦后的光强分布表达式.在雷利散射范围内,利用光作用在介质球上的梯度力和散射力公式,主要讨论了拓扑荷数、相干长度、参数α以及介质球的大小选择对于梯度力和散射力的影响.数值模拟结果表明,作用在介质球上的梯度力和散射力随着拓扑荷数、相干长度或参数α的增大而减小.当拓扑荷数为0,1时,稳定的3维光阱能被获得,并且能被应用于操控折射率低于周围媒介的粒子.
응용부분상간이론추도료부분상간패새이와선광속경과투경취초후적광강분포표체식.재뢰리산사범위내,이용광작용재개질구상적제도력화산사력공식,주요토론료탁복하수、상간장도、삼수α이급개질구적대소선택대우제도력화산사력적영향.수치모의결과표명,작용재개질구상적제도력화산사력수착탁복하수、상간장도혹삼수α적증대이감소.당탁복하수위0,1시,은정적3유광정능피획득,병차능피응용우조공절사솔저우주위매개적입자.
The radiation forces of focused partially coherent Bessel vortex beams on a dielectric sphere in the Rayleigh scattering regime are theoretically investigated. Numerical results demonstrate that the magnitude of the radiation forces on a dielectric sphere near the focus point decreases as the topological charge, the coherence length or the parameter α increases. When the topological charge n=0,1, the stable three-dimensional trap can be obtained, and can be used to manipulate the particle with a refractive index lower than that of the ambient media.