Fig. 1. Schematic and results. (a) FDTD simulation model; (b) structure of terahertz polarizer; (c) influence of duty ratio (K=d/T) on transmissivity of terahertz polarizer

Fig. 2. Transmissivity of terahertz polarizer. (a) Influence of aluminum foil thickness on transmissivity of terahertz polarizer; (b) transmissivity of polarizer when H=40 μm

Fig. 3. Electric field distributions in wire grids of terahertz polarizer under different aluminum foil thicknesses. (a) 10 μm; (b) 20 μm; (c) 30 μm; (d) 40 μm; (e) 50 μm

Fig. 4. Terahertz polarizer on Teflon substrate. (a) Physical picture; (b) optical micrograph

Fig. 5. Results. (a) Terahertz time-domain signals of terahertz polarizer on Teflon substrate under different rotation angles; (b) frequency domain spectra after fast Fourier transformation of time-domain signals; (c) transmissivity of terahertz polarizer obtained in experiment; (d) transmissivity obtained by FDTD simulation

Fig. 6. Characteristics of terahertz polarizer. (a) Extinction ratio; (b) polarization degree