Tao Xiang, Qi Limei, Yang Jun, Liu Fanyi
School of Electronic Engineering, Beijing University of Posts and Telecommunications Beijing 100876 China
School of Information and Communication Engineering, Beijing University of Posts and Telecommunications Beijing 100876 China.
RSC Adv. 2020 Feb 10;10(11):6179-6184. doi: 10.1039/c9ra10861k. eCollection 2020 Feb 7.
In this work, a broadband terahertz asymmetric transmission metamaterial is experimentally demonstrated for a linearly polarized wave. The measured transmission coefficient is larger than 0.6 from 0.55 to 0.82 THz, and reaches a peak value of 0.714 at 0.62 THz, while the transmission coefficient is lower than 0.2 from 0.4 to 0.9 THz. The calculated asymmetric transmission parameter of the measurement ranges from 0.53 to 0.84 THz for magnitudes over 0.4. The peak value reached 0.65 at the frequency of 0.78 THz. The physical mechanism of the polarization conversion was also analyzed from the distributions of the surface currents and electric fields.
在这项工作中，实验展示了一种用于线偏振波的宽带太赫兹非对称传输超材料。从0.55至0.82太赫兹，测得的传输系数大于0.6，并在0.62太赫兹处达到峰值0.714，而在0.4至0.9太赫兹范围内，传输系数低于0.2。测量的非对称传输参数的计算范围为0.53至0.84太赫兹，幅度超过0.4。在0.78太赫兹频率处峰值达到0.65。还从表面电流和电场的分布分析了偏振转换的物理机制。
