Fig. 4: \({{{ C}}}_{4}^{i}\) gating of CP channels and independent hologram manipulation. | Nature Communications

Fig. 4: \({{{ C}}}_{4}^{i}\) gating of CP channels and independent hologram manipulation.

From: Reaching the efficiency limit of arbitrary polarization transformation with non-orthogonal metasurfaces

Fig. 4: $${{{ C}}}_{4}^{i}$$ C 4 i gating of CP channels and independent hologram manipulation.

(A) Schematic of the proposed mechanism for different \({{{{\boldsymbol{C}}}}}_{4}^{i}\)(i = 1, 2, 3, 4) gating effects. The schematics representing on and off light bulbs are used to illustrate the gated and suppressed channels. Insets also display the corresponding distributions of theoretically calculated eigen-state pairs on the Poincaré spheres. B Photograph of fabricated sample for \({{{{\boldsymbol{C}}}}}_{4}^{1}\) gating for L-L channel, where H denote the total thickness (about 0.15λ0) of the sample. C Measured energy intensity in xy plane with z = 5λ0 of four representative non-orthogonal metasurfaces for \({{{{\boldsymbol{C}}}}}_{4}^{1}\) gating with hologram image “1” in L-L channel, \({{{{\boldsymbol{C}}}}}_{4}^{2}\) gating with “1” in L-L channel and “2” in R-L channel, \({{{{\boldsymbol{C}}}}}_{4}^{3}\) gating with “1”, “2”, “3” in L-L, R-L and L-R channel, \({{{{\boldsymbol{C}}}}}_{4}^{4}\) gating with “1”, “2”, “3”, “4” in all four channels, respectively. D Measured efficiencies in all CP channels of four fabricated samples. E Measured correlation coefficient ρ0 of four representative samples within the bandwidth. F Measured ρmn for cross-talk characterization at 10 GHz.

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