Guo Hanming, Sui Guorong, Weng Xiaoyu, Dong Xiangmei, Hu Qi, Zhuang Songlin
Shanghai Key Laboratory of Modern Optics System, Institute of Optical-Electrical Engineering, University of Shanghai for Science and Technology, 516 Jungong Road, Shanghai 200093, China.
Opt Express. 2011 Nov 21;19(24):24067-77. doi: 10.1364/OE.19.024067.
The numbers of the focal spots and the dominant field (i.e., whether the axial field or the transverse fields play dominant role in the focusing field) have significant effects on various applications. In this paper, we have derived the universal imaging model of the composite vector beam (CVB) composed of two orthogonally linearly polarized beams with inhomogeneous polarization modulation, which is also suitable for various polarized beams, such as linearly, circularly, radially, azimuthally, and vortex polarized beams. Moreover, the sin&cos amplitude modulation with arbitrary orders and the pupil filters with cylindrical symmetry are also involved in this imaging model. On the basis of this imaging model, the regulars to control the focal numbers and the dominant field are drawn. For the various applications, some important conclusions and constructive advices are given.
焦斑的数量以及主导场（即轴向场还是横向场在聚焦场中起主导作用）对各种应用有显著影响。在本文中，我们推导了由两个具有非均匀偏振调制的正交线偏振光束组成的复合矢量光束（CVB）的通用成像模型，该模型也适用于各种偏振光束，如线偏振、圆偏振、径向偏振、角向偏振和涡旋偏振光束。此外，该成像模型还涉及任意阶的正弦和余弦幅度调制以及具有圆柱对称性的光瞳滤波器。基于此成像模型，得出了控制焦斑数量和主导场的规律。针对各种应用，给出了一些重要结论和建设性建议。
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