Cross-polarization Amplitude Modulator Based on THz Dynamic Metasurface

We propose a dynamic metasurface based on a HEMT that achieves efficient linear polarization conversion in the terahertz band through a metal-media-metal three-layer design, and changes its mode of operation by integrating a HEMT into a frontal metal microstructure to produce a dynamic modulation effect. In the simulation, the modulation depth of the generated cross-polarized wave is up to 90.7%.