论文信息 - Manipulation of polarization-dependent multivortices with quasi-periodic subwavelength structures.

Manipulation of polarization-dependent multivortices with quasi-periodic subwavelength structures.

Multiple vortices with different topological charges are formed by the use of two sequential geometric phase elements. These elements are realized by quasi-periodic subwavelength gratings. The first element is a spiral phase element and the second element is a spherical phase element. We provide a theoretical analysis and an experimental demonstration of the formation of the multiple vortices that comprise scalar vortices and a vectorial vortex.

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