Fig. 1. Schematic diagrams of two types of holograms: (a) an OAM-preserved hologram and (b) an OAM-selective hologram. These holograms are designed to transfer the OAM property from an incident OAM beam to a holographic image and to reconstruct specific OAM channels, respectively. Top: the conventional OAM beam. Bottom: the proposed VL beam. {a1}* and {β1}* are the equivalent values of α2 and β1 for the conjugate phase of the encoded phase, respectively.

Fig. 2. OAML mode selectivity. (a) Design concept for an OAM-preserved hologram and an OAM-selective hologram. (b) Mode selectivity of the constant l. (c) Mode selectivity of α. (d) Mode selectivity of β.

Fig. 3. (a) Schematic diagram of the experimental setup of OAML hologram. (b) The hologram loaded into the SLM consists of two components: the decoded phase and the OAM hologram.

Fig. 4. Schematic diagram of OAML multiplexed holography designed with key l. (a) Design process. (b)–(e) Experimental reconstruction results based on the l-dependence of the incident VL beams with (l=−1, −11, −21, −31, {α}*=−0.2π/2, −0.2π/2, −0.2π/2, −0.2π/2, {β}*=−0.001, −0.001, −0.001, −0.001), respectively. (f)–(i) Capture intensity distributions of the above VL beams, respectively. (j) Experimental reconstruction results of the OAML-preserved holography.

Fig. 5. Schematic diagram of OAML multiplexed holography designed with key α. (a) Design process. (b)–(e) Experimental reconstruction results based on the α-dependence of the incident VL beams with (l=−1, −1, −1, −1, {α}*=−0.1π/2, −0.2π/2, −0.3π/2, −0.4π/2, {β}*=−0.001, −0.001, −0.001, −0.001), respectively. (f)–(i) Capture intensity distributions of the above VL beams, respectively. (j) Experimental reconstruction results of the OAML-preserved holography.

Fig. 6. Schematic diagram of OAML multiplexed holography designed with key β. (a) Design process. (b)–(e) Experimental reconstruction results based on the β-dependence of the incident VL beams with (l=−1, −1, −1, −1, {α}*=−0.1π/2, −0.1π/2, −0.1π/2, −0.1π/2, {β}*=−0.001, −0.002, −0.003, −0.004), respectively. (f)–(i) Capture intensity distributions of the above VL beams, respectively. (j) Experimental reconstruction results of the OAML-preserved holography.