Figure 2. OAM mapping based on inversely-designed meta-waveguide. (IMAGE)

Light Publishing Center, Changchun Institute of Optics, Fine Mechanics And Physics, CAS

Figure 2. OAM mapping based on inversely-designed meta-waveguide.

Caption

Figure 2. OAM mapping based on inversely-designed meta-waveguide. Mapping gratings converting diverse waveguide-modes to OAM beams are initially constructed based on the holographic principle. Following structural discretization, the patterns are finely optimized via inverse design algorithms. The resulting meta-waveguide enables high-purity mapping between eight distinct guided waveguide modes and eight free-space vortex beams with prescribed polarizations and orbital angular momenta.

Credit

Minming Zhang et al.

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CC BY

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