Active modulation of the transmission properties of a far infrared all-dielectric metasurface

Abstract

All-dielectric metasurfaces with tunable and reconfigurable properties have broad application prospects. Here,an all-dielectric metasurface with a MgF 2 layer and a ZrTe 5 array is measured and simulated (The simulation software is HFSS) A transmission valley V1 (amplitude is 0.21, resonance frequency is 10.18 THz) is achieved based on the localized surface plasmon (LSP) mode coupling between four unit cells without external magnetic field. In the first set of measurements, a magnetic field is applied along the x-axis, the measured transmission valley V1 is reduced and the resonant frequency is stabilized. Moreover, a new transmission valley V2 is excited based on the LSP mode coupling between two unit cells. The amplitude of the transmission valley V2 is dependent on the applied magnetic field. In the second set of measurements, a magnetic field is applied along the 450-axis, the amplitude of the transmission valley V1 is also reduced, and a transmission valley V3 is obtained due to the surface plasmon polarization (SPP) modes coupling. The amplitude of the transmission valley V3 is decreased with the increase of the magnetic field, and the resonance frequency is shifted towards the higher frequencies.