Numerical demonstration of an HMM Airy beam generator in the near-infrared range. (a) The amplitude (red line) and propagation phase (blue line) of the transmitted RCP electric field as a function of W_l. The introduced PB phases, denoted as green and purple lines, cause the transmission phase of RCP to be zero and π, respectively. (b) W_l and θ as a function of the serial number of the RHMM unit. (c) The electric field intensity distribution of the transmitted RCP waves under LCP incidence at 1.55 μm.