艾里涡旋光束的多空间维度自由调控  

Arbitrary Modulation of Airy Vortex Beam in Multi-spatial Dimensions

作　　者：王亚坤 台玉萍[2] 李新忠 WANG Yakun;TAI Yuping;LI Xinzhong(School of Physics and Engineering,Henan University of Science and Technology,Luoyang,Henan 471023,China;School of Chemical Engineering and Pharmaceutics,Henan University of Science and Technology,Luoyang,Henan 471023,China;State Key Laboratory of Transient Optics and Photonics Xi'an Institute of Optics and Precision Mechanics Chinese Academy of Sciences,Xi'an 710119 China)

机构地区：[1]河南科技大学物理工程学院,河南洛阳471023 [2]河南科技大学化工与制药学院,河南洛阳471023 [3]中国科学院西安光学精密机械研究所瞬态光学与光子技术国家重点实验室,西安710119

出　　处：《光子学报》2022年第1期249-258,共10页Acta Photonica Sinica

基　　金：国家自然科学基金(No.11974102);河南省高等学校重点科研项目(No.21zx002);瞬态光学与光子技术国家重点实验室开放基金(No.SKLST201901)。

摘　　要：基于多坐标变换技术,依次对一维艾里光束、二维艾里光束以及艾里涡旋光束进行不同坐标系下的变换,实现了艾里光束的两个边瓣方向和嵌入的光学涡旋方向在0到2π范围内的自由调控。分析了边瓣夹角分别为钝角和锐角时的艾里光束以及边瓣垂直时的艾里涡旋光束在传播距离0、2、6、10 cm处的传播动力学特性。理论与实验研究结果表明,通过边瓣夹角的变化,可以使调控后的光束沿任意抛物线轨迹及传播方向运动。此外,当边瓣方向相反时,通过添加位移因子d,实现了嵌入的光学涡旋拓扑荷的原位测量。该方法不需要额外的光学元件,并且不受环境振动和寄生干扰的影响。本文方法将促进艾里涡旋光束在微粒捕获和光学清扫等领域的应用,并且具有普适性,可用于不同复合光场的组合与拆解,为其多维调控提供了新的解决思路。As a composite optical field, Airy vortex beam possessing transverse and longitudinal superimposed modes has abundant intensity and phase distributions. However,the composite optical field is limited to the specific propagation direction and complex modulation of the propagation trajectory. To address these issues,based on the multicoordinate transformations,one-dimensional Airy beam,twodimensional Airy beam and Airy vortex beam have been transformed in different coordinate systems,respectively. We have realized the orientation modulation of the two lobes of Airy beam and the embedded optical vortex in the range of 0-2π,independently. We have studied the propagation properties in the propagation distances of 0,2,6,and 10 cm in the case of the obtuse and acute angles between two lobes of the Airy beam and the Airy vortex beam with orthogonal lobes,respectively. The results of experiments and numerical simulations show that the generated optical field can propagate along arbitrarily appointed parabolic trajectories and directions in free space. In addition,a method for measuring topological charge is proposed by adding the shift factor d when the directions of the lobes are opposite. This proposed method enables in situ determination of the embedded optical vortexes′ topological charge without the need for additional optical elements,and it is immune to environmental vibration and parasitic interference. Our results promote the applications of Airy vortex beam in particle manipulation and optical cleaning and provide an alternative scheme for the modulation of composite optical field.Measurement of the topological charge and the intensity profiles at different propagation distance via the experimental setup.

关 键 词：物理光学 复合光场 艾里涡旋光束 多坐标变换 拓扑荷 传输 

分 类 号：O436[机械工程—光学工程] O436.1[理学—光学]