A nonlinear orbital angular momentum (OAM) beam was obtained by tungsten disulfide−gold nanohole hybrid metasurfaces. We determinate the topological charges of the optical vortex beam by using the coaxis metasurface interferometry, which were ~2. The nonlinear metasurface proposed in this work opens a new avenue for manipulating the OAM to design the next generated optical communication.

© 2019 The Author(s)

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