Figure 2
From: Generation of orbital angular momentum modes via holographic leaky-wave metasurfaces
(a) The interference pattern of the reference wave and the object wave in direction \({\theta }_{0}\)= 0 and φ0 = 0 for OAM mode with topological charge 2. (b) The interference pattern of the reference wave and the object wave in direction \({\theta }_{0}\)= 0 and φ0 = 0 for OAM mode with topological charge 3.
