Lai Wei, Yong Chen, Shaoyi Wang, Quanping Fan, Qiangqiang Zhang, Zhong Zhang, Zhanshan Wang, Leifeng Cao. Suppression of higher diffraction orders using quasiperiodic array of rectangular holes with large size tolerance[J]. High Power Laser and Particle Beams, 2020, 32(7): 072002
- High Power Laser and Particle Beams
- Vol. 32, Issue 7, 072002 (2020)
Fig. 1. Schematic of the distribution of holes in the array: from δ -function to arbitrary positive function
Fig. 2. (a) Design for a quasi-periodical hole array: in each lattice (d ×d square), a rectangular hole with side lengths of d /6 and d is positioned randomly on the ξ n axis and has a trapezoidal distribution profile shown in (b)
Fig. 3. Comparison between far-field diffraction patterns of a quasi-periodical array shown in Fig. 2 when H ＝L ＝100 and a periodic grating with a duty cycle of 1∶5 and 201 periods
Fig. 4. (a) Intensity profiles of Fig. 3(a) –(c) across the line q ＝λ /2d (indicated by yellow dashed lines in Fig. 3 ); (b) numerical results of Eq. (1) across the p -axis for the rectangular holes with side lengths of d /5 and d (red dot), and 2d /15 and d (black line).
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