Fig. 1 | Scientific Reports

Fig. 1

From: High efficiency focusing vortex generation and multichannel multiplexing based on terahertz metasurfaces

Fig. 1

(a) Schematic of the designed vortex metalenses. All unit cells were arranged in concentric circles. The inset displays top and side views of the unit cell. Simulated transmission magnitudes (b) and phase spectra (c) of the designed unit cell under various linear polarized incidence. (d) The cross-polarized transmission magnitudes illuminated by the normally incident LCP wave. Simulated co-polarized transmittance \({T}_{LL}\), cross-polarized transmittance \({T}_{RL}\), PCR and cross-polarized transmission phase changes \({\varphi }_{RL}\) of the unit cells with various rotation angles under LCP incidence normally at 0.83 THz (e) and 1.72 THz (f).

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