用于高效太赫兹交叉极化转换的反射式超表面
A Reflective Metasurface for High-Efficiency Terahertz Cross-Polarization Conversion
AI总结：
该研究提出一种基于双环铝谐振器的反射式太赫兹超表面，经仿真优化和实验验证，在两个谐振频率下实现超87%的极化转换比，可用于高效太赫兹交叉极化转换。
AI中文摘要：
我们展示了一种基于石英衬底上双环铝谐振器的反射式太赫兹（THz）极化转换超表面。通过全波仿真优化单元结构，并利用相位分析、极化椭圆和表面电流分布研究极化转换机制。该超表面在0.333 THz和0.361 THz谐振频率处呈现接近1的极化转换比（PCR）。反射式太赫兹时域光谱（THz-TDS）测量结果与仿真吻合良好，实测PCR在两个谐振频率处均超过87%，证明了高效的反射式极化转换性能。
英文摘要：
We demonstrate a reflective terahertz (THz) polarization conversion metasurface based on a double-ring aluminum resonator on a quartz substrate. Full-wave simulations are used to optimize the unit-cell geometry and investigate the polarization conversion mechanism through phase analysis, polarization ellipses, and surface-current distributions. The proposed metasurface exhibits a near-unity polarization conversion ratio (PCR) at resonance frequencies of 0.333 THz and 0.361 THz. Reflection-mode terahertz time-domain spectroscopy (THz-TDS) measurements show good agreement with the simulated results. The measured PCR exceeds 87% at both resonance frequencies, demonstrating efficient reflection-mode polarization conversion.
