Figure 3
From: Broadband polarization conversion with anisotropic plasmonic metasurfaces
Recorded images of the vortex based spiral interference patterns for optical beam passing through the reference glass substrate (Ref) and the metasurface sample (Meta) under two orthogonal linear polarizations at wavelengths from 1480 nm to 1580 nm with a 20 nm interval. The rotation angles ϕ xx and ϕ yy of the spiral interference patterns from the metasurface relative to the reference glass substrate are listed.
