中国激光, 2020, 47 (7): 0702003, 网络出版: 2020-07-10
激光直写制备完美涡旋光束微波带片 
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Fabrication of Perfect Vortex Beam Microplate Using Direct Laser Writing
图 & 表
图 1. 三种器件的典型相位分布。(a)螺旋相位板的相位分布,拓扑荷数l=1;(b) RPS-FZP的相位分布,径向相移控制参数α=0.2,波长λ=1550 nm,焦距f=120 μm;(c) RSSZP的相位分布,由(a)和(b)叠加而成
Fig. 1. Typical phase distribution of three devices. (a) Phase distribution of spiral phase plate, topological charge l=1; (b) phase distribution of RPS-FZP, control parameter of radial phase shift α=0.2, wavelength λ=1550 nm, and focal length f=120 μm; (c) phase distribution of RSSZP, formed by superposition of (a) and (b)
图 2. 不同拓扑荷数和径向相移控制参数下的RSSZP传输函数归一化分布仿真结果。(a) l=1,α=0.2;(b) l=3,α=0.2;(c) l=3,α=0.4
Fig. 2. Normalized distribution of RSSZPs transfer function obtained at different topological charges and control parameters of radial phase shift. (a) l=1, α=0.2; (b) l=3, α=0.2; (c) l=3, α=0.4
图 3. 具有不同拓扑荷数和径向相移控制参数的RSSZP样片的SEM图。(a) l=1,α=0.2;(b) l=3,α=0.2;(c) l=3,α=0.4
Fig. 3. SEM images of RSSZPs with different topological charges and control parameters of radial phase shift. (a) l=1, α=0.2; (b) l=3, α=0.2; (c) l=3, α=0.4
图 4. 基于MZI的实验测试系统示意图,用来测量RSSZP样片产生的远场强度分布及其与高斯光束的干涉图样
Fig. 4. An MZI-based experimental test system is used to measure the far-field intensity distribution generated by the RSSZP samples and its interference patterns with Gaussian beam
图 5. 不同参数的RSSZP在焦平面上的数值仿真与测量强度分布。(a)(b)分别是α=0.2时的数值仿真和实验测量结果;(c)(d)分别是α=0.4时数值仿真和实验测量结果
Fig. 5. Simulated and experimental intensity distributions of RSSZP with different parameters at focal plane. (a)(b) Simulated and experimental measurement results when α is 0.2; (c)(d) simulated and experimental measurement results when α is 0.4
图 6. 不同拓扑荷数下,径向相移控制参数α不同的RSSZP样片产生的涡旋光束半径的数值仿真结果与实验测量结果
Fig. 6. Simulated and experimental radii of vortex beam generated by RSSZP samples with different control parameters of radial phase shift at different topological charges
图 7. RSSZP产生的完美涡旋光与球面波的干涉图样
Fig. 7. Interference patterns of RSSZP generated perfect vortex beams with spherical wave
秦燕亮, 黄轶, 涂谱, 张琦, 赵茗, 杨振宇. 激光直写制备完美涡旋光束微波带片[J]. 中国激光, 2020, 47(7): 0702003. Qin Yanliang, Huang Yi, Tu Pu, Zhang Qi, Zhao Ming, Yang Zhenyu. Fabrication of Perfect Vortex Beam Microplate Using Direct Laser Writing[J]. Chinese Journal of Lasers, 2020, 47(7): 0702003.
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