摘要
主要研究了调制入射光场的衍射光学元件(DOE)对聚焦场的影响。以贝塞尔-高斯光束为例,利用Richards-Wolf矢量衍射积分理论,分析几种不同DOE结构调制的径向偏振光束的4π聚焦场。数值模拟结果表明径向偏振光束经DOE调制后的4π聚焦,在焦平面附近形成了具有潜在应用价值的多光球结构,并且发现形成的光球的个数与DOE的环数有关,而DOE的透射函数对其影响较小,且所形成光球的个数会随着DOE结构环数的增加而增加。
The effect of diffractive optical elements(DOE) modulating the incident light field on the focusing field is studied. The 4π focusing properties of Bessel-Gaussian beams radially polarized after modulated by several different DOEs are analyzed via the Richards-Wolf vector diffraction theory. The numerical simulation results show that multiple spherical spots of potential applications form near the focal plane, and the number of spherical spots is related to that of the belts on DOE, while the DOE transmission function has little influence upon it. Moreover, the number of spherical spots increases with that of the belts on the DOE.
作者
段慧慧
杨艳芳
何英
闫皙玉
李路路
Duan Huihui;Yang Yanfang;He Ying;Yan Xiyu;Li Lulu(Department of Physics,College of Sciences,Shanghai University,Shanghai 200444,China)
出处
《光学学报》
EI
CAS
CSCD
北大核心
2021年第20期166-171,共6页
Acta Optica Sinica
基金
上海市自然科学基金(16ZR1411600)
国家自然科学基金(61108010,11574195)。
关键词
物理光学
偏振
衍射光学元件
4π聚焦系统
光球
physical optics
polarization
diffractive optical element
4πfocusing system
spherical spot
