Figure 1
From: Reconfigurable metasurfaces that enable light polarization control by light
Polarization effects of the plasmonic nanostructure. (a) Because the metasurface is chiral and anisotropic in structure, a linearly polarized wave becomes elliptically polarized and its polarization azimuth rotates after passing through the nanostructure. Changes in the polarization states in the transmitted wave compared with the incident wave are defined by polarization azimuth rotation ϕ and ellipticity angle χ. Positive values of ϕ and χ correspond to the clockwise rotation of the polarization azimuth and a right-handed polarization ellipse, respectively, as observed against the propagation direction. The scanning electron micrograph shows a single meta-atom along with the dimensions. (b) The spectra of the hybrid metasurface. T corresponds to transmission; R corresponds to reflection; and A corresponds to absorption. (c) Spectral dependence of the polarization changes by the nanostructure in terms of polarization azimuth rotation ϕ and ellipticity angle χ in the wavelength range of 700–950 nm (circles show the experimental data points, solid curves are simulation results).
