Fig. 1. Transition mechanism diagram of FTM.

Fig. 2. Experiment setup. λ/2, half-wave plate; M, mirror; L1, lens with focal length of 100 mm; L2, lens with focal length of 300 mm; SLM, spatial light modulator; CCD, charge coupled device. The inset depicts the hologram of LGB-HA.

Fig. 3. Two methods for the generation of LGB-HA corresponding to numerical simulation under NA = 0.09, B = 4, m = 3, ω_x = 0.3, γ_p = 0.3 with various phase factor n. (a1)–(a3) Numerical simulation results for n = 3, 4, and 6, respectively; (b1)–(b3) experimental results of FTM with phase parameter n = 3, 4, and 6; (c1)–(c3) phase patterns consist of the upper left corner mapping to FTM and the lower right corner mapping to CAM. (d1)–(d3) Experimental results of CAM with phase parameter n=3, 4, and 6.

Fig. 4. Intensity distributions of LGB-HA corresponding to numerical simulation under NA = 0.09, B = 4, m = 3, ω_x = 0.3, γ_p = 0.3 with different phase factor n. The upper layer is simulation results, the bottom layer is experiment results, and the middle layer is the complex amplitude hologram. Internal details emerge corresponding to the regions marked by the overlaid white circles.

Fig. 5. Normalized axis-directed energy distribution profiles in the focal plane of the simulation results, FTM and CAM under m = 3, B = 4, n = 6. (a) Theoretical simulation results. (b) Experimental result of FTM. (c) Experimental result of CAM.