高级次轴对称偏振光束的聚焦特性及应用综述

摘要

High order axially symmetric polarized beams (ASPBs)have complex polarization distributions,and multi-ple very small focal spots can be obtained under the condition of high NA focusing.ASPBs can be used in many fields because of its focusing characteristics,such as microscopy,material processing and particle trapping,etc.The research results about focusing properties and applications of ASPBs in recent years are summarized.The basic concept of AS-PBs is introduced,and the mathematical expressions of focused fields are given based on vector diffraction theory.Finally,some typical applications of ASPBs in particle trapping and parallel microscopy are described in de-tails.%高级次轴对称偏振光束具有更为复杂的偏振分布，在高数值孔径聚焦情况下可获得多个超小聚焦光斑，这样的聚焦特性使其在显微成像、材料加工、粒子捕获等领域体现出一定的应用价值，引起了广泛关注。综述了近年来关于高级次轴对称偏振光束的聚焦特性及主要应用的研究成果。介绍了高级次轴对称偏振光束的基本概念，并基于矢量衍射理论给出了聚焦场的数学表达式，最后介绍了该类型光束在粒子捕获与操控、并行光学显微成像方面的典型应用。