几何相位调制参数对艾里光束的影响  

Effect of Geometric Phase Modulation Parameter on Airy Beams

作　　者：晏庆玉 王冠学 李仔艳 康翔宇 高秀敏[1] Yan Qingyu;Wang Guanxue;Li Ziyan;Kang Xiangyu;Gao Xiumin(School of Optical-Electrical and Computer Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China)

机构地区：[1]上海理工大学光电信息与计算机工程学院,上海200093

出　　处：《光学学报》2022年第14期39-46,共8页Acta Optica Sinica

基　　金：国家自然科学基金(62171172)。

摘　　要：为研究艾里光束的聚焦特性,基于几何相位推导出了圆柱坐标系下聚焦区域附近电磁强度矢量和能量通量的理论公式,并利用矢量衍射理论对其可行性进行了验证。结果表明:几何相位调制参数可以显著改变艾里光束的主瓣尺寸、光瓣间距和能量分布;通过在艾里光束原立方相位基础上引入涡旋相位,有效地转换了光束主瓣的能量和相位,且光束主瓣不再保持原有形态。本研究为艾里光束在光学采样与操作、光通信、数据存储和成像等领域中的应用提供了一定的基础。In order to investigate the focusing characteristics of Airy beams,the theoretical formulas for the electromagnetic intensity vector and energy flux near the focusing region in cylindrical coordinate system are derived based on geometric phase,and their feasibilities are verified by vector diffraction theory.The results show that the geometric phase modulation parameter can significantly change the main lobe size,lobe spacing and energy distribution of the Airy beam.The energy and phase of the main lobe of the beam are effectively converted by introducing the vortex phase to the original cubic phase of Airy beams,and the main lobe of the beam no longer maintains its original shape.This research provides a basis for the application of Airy beams in optical sampling and manipulation,optical communication,data storage and imaging.

关 键 词：衍射 几何相位 矢量衍射理论 艾里光束 能量分布 

分 类 号：O436[机械工程—光学工程]