A novel quad-polarization reconfigurable holographic artificial impedance surface that exploits the tunable dielectric permittivity of nematic liquid crystal is proposed. The arc-shaped strip is introduced and serves as the fundamental element, and further combined with holographic modulation, electromagnetic radiation at the terahertz band is realized. By partitioning the circular surface into several sectors, studies show that just two impedance values for each sector are enough to reconfigure among different polarizations. The presented demonstrator has a radius of 4.3λ ₀, where λ ₀ is the wavelength in free space at 1.25 THz, and is excited by a monopole. It can be dynamically reconfigured among vertical linear polarization, horizontal linear polarization, right-hand circular polarization, and left-hand circular polarization at the boresight.

提出了一种利用向列液晶的可调介电常数的新型四极化可重构全息人工阻抗表面。引入弧形条带作为基本元件，进一步结合全息调制，实现太赫兹波段的电磁辐射。通过将圆形表面划分为几个扇区，研究表明每个扇区仅两个阻抗值就足以在不同的极化之间重新配置。演示器的半径为 4.3 λ ₀，其中λ ₀是自由空间中 1.25 THz 的波长，由单极子激发。它可以在视轴处在垂直线极化、水平线极化、右旋圆极化和左旋圆极化之间动态重新配置。