Fig. 1. (a) Polarization conversion principle of the MPM. (b) Size dimensioning of the MPM. (c) Schematic diagram of the angle-resolved terahertz time-domain spectroscopy polarization system (AR-THz-TDPS) experimental system. (d) Design flowchart of the MO metasurface: phase design, equation deduction, data screening, and confirmation of the meta-atom size (inset graph: the Si-dielectric metasurface and its local electron micrograph). (e) Schematic diagram of the beam deflection of the dynamical MO metasurface at f1=0.25THz and f2=0.5THz.

Fig. 2. Simulation transmission map with different frequencies and deflection angle ranges under the working EMFs of +0.24, 0, and −0.24T.

Fig. 3. (a) Experimental intensity transmission spectra at different deflection angles under three working EMFs. The detailed intensity transmission efficiency under the deflection angles of Φ1, Φ2, and Φ3 and the working EMFs at (b) 0.25 and (c) 0.5 THz. (d) Modulation depths of different deflection channels of Φ1, Φ2, and Φ3.

Fig. 4. (a) Diagrammatic sketch of the 2D far-field scanning THz-TDS experimental system. (b) Schematic diagram of the focused far-field at dynamical multiplexing channels. (c) Far-field distributions of target polarization at dual frequencies and three working EMFs. (d) Values of Γchannel at different deflection angles (Φ1, Φ2, and Φ3) and EMFs from −0.24 to +0.24T.

Fig. 5. (a) Schematic diagram of the nonreciprocal one-way transmission. (b) Simulated transmission map with various EMFs from −0.24 to +0.24T at a frequency band of 0.15 to 0.65 THz under the deflection angles of Φ1 and Φ3. The transmission efficiency with various EMFs under the deflection angles of Φ1 and Φ3 at (c) 0.25 and (d) 0.5 THz. (e) Isolation rates of the MO system at dual working frequencies under different EMFs from 0 to 0.24 T.