Mu Tingkui, Chen Zeyu, Pacheco Shaun, Wu Rengmao, Zhang Chunmin, Liang Rongguang
Opt Lett. 2016 Jan 15;41(2):261-4. doi: 10.1364/OL.41.000261.
In this Letter, the focal spot areas of an azimuthally polarized beam modulated with a vortex-0-2π-phase plate or a π-phase-step plate are numerically found to be smaller than a radially polarized beam for three pupil functions with uniform, Gaussian, and Bessel-Gauss profiles. Several types of multizone phase plates are theoretically designed and numerically simulated for generating tight multifocal arrays from the azimuthally polarized beams for what we believe is the first time. The positions and polarization states of the multifocal arrays can be controlled simply by varying the pattern of the multizone plates. The produced multifocal array with controllable position and polarization is beneficial to parallel optical recording and parallel optical imaging.
在本信函中，通过数值计算发现，对于具有均匀、高斯和贝塞尔 - 高斯分布的三种光瞳函数，用涡旋0 - 2π相位板或π相位阶跃板调制的方位角偏振光束的焦斑面积小于径向偏振光束。理论上设计了几种类型的多区域相位板，并首次对其进行了数值模拟，以从方位角偏振光束生成紧密的多焦点阵列。通过改变多区域相位板的图案，可以简单地控制多焦点阵列的位置和偏振状态。所产生的具有可控位置和偏振的多焦点阵列有利于并行光学记录和并行光学成像。
