Abstract A three-layer complementary strip Dirac semimetal polarizer is proposed to achieve polarization rotation, perfect polarization conversion, and asymmetric transmission. This device can realize broadband polarization operation of linear polarized waves in the terahertz frequency domain. By changing the Fermi level of the Dirac semimetal, the polarization angle of linearly polarized light in the frequency range of 1.3 to 1.63 THz can be rotated from 0°to 90°, and the device has good robustness for linearly polarized light with different incident angles. When used as an asymmetric transmission device, its polarization conversion efficiency reaches more than 98% and the asymmetric transmission parameter reaches more than 50% in the range of 1.3–1.63 THz. The asymmetric transmission parameters, polarization conversion ratio, polarization rotation angle, and ellipticity are used to describe the performance of the converter.

中文翻译：

---

基于狄拉克半金属的用于偏振旋转和线性非对称传输的多功能可调谐宽带太赫兹装置

摘要 为了实现偏振旋转、完美的偏振转换和非对称传输，提出了一种三层互补条带狄拉克半金属偏振器。该装置可实现太赫兹频域线极化波的宽带极化操作。通过改变狄拉克半金属的费米能级，可将1.3~1.63 THz频率范围内的线偏振光的偏振角从0°旋转至90°，器件对不同入射角的线偏振光具有良好的鲁棒性. 用作非对称传输器件时，其偏振转换效率达到98%以上，非对称传输参数在1.3-1.63 THz范围内达到50%以上。非对称传输参数、偏振转换比、