Fig. 4
From: Planar efficient metasurface for generation of Bessel beam and super-resolution focusing
a − c Mode purity of OAM in the higher-order Bessel beams at n = 1, n = ± 2, n = 3
Fig. 4 | Optical and Quantum Electronics
From: Planar efficient metasurface for generation of Bessel beam and super-resolution focusing
a − c Mode purity of OAM in the higher-order Bessel beams at n = 1, n = ± 2, n = 3