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. 2023 Jan 27;9(4):eadf8478. doi: 10.1126/sciadv.adf8478

Fig. 4. Experimental demonstration of the performance of the meta-device for varifocal Airy beam generation.

Fig. 4.

(A) Illustration of the modulation range of the focal spot. All dots are numerically calculated on the basis of the theoretical analysis (see the database for the position of the spot and the corresponding rotation angle of each metasurface in table S1). The solid dots are verified in experiments. (B) Theoretical and (C) experimental results of the varifocal Airy beam in the xy plane. Scale bars, 10 mm. (D) Theoretical and (E) experimental results of the varifocal Airy beam in the xz plane. The direction of incidence is toward the positive z axis.