Terahertz narrow bandstop, broad bandpass filter using double-layer S-shaped metamaterials

• Published in: Science China. Information sciences Vol. 56; no. 12; pp. 128 - 134
• Main Authors: Liang, LanJu, Jin, BiaoBing, Wu, JingBo, Zhou, GaoChao, Zhang, YongGang, Tu, XueCou, Jia, Tao, Jia, XiaoQing, Cao, ChunHai, Kang, Lin, Xu, WeiWei, Chen, Jian
• Format: Journal Article
• Language: English
• Published: Berlin/Heidelberg Springer Berlin Heidelberg 01.12.2013; Springer Nature B.V
• Subjects: Bandpass filters; China; Computer Science; Electric fields; Horizontal polarization; Information Systems and Communication Service; Insertion loss; Metamaterials; Special Focus; Terahertz frequencies; Time domain analysis; Vertical polarization; 传输特性; 垂直入射; 太赫兹时域光谱; 带通滤波器; 带阻; 材料; 电场极化; filter; metamaterial; transmission; terahertz; double-layer S-shaped material
• ISSN: 1674-733X; 1869-1919
• DOI: 10.1007/s11432-013-5034-z

Abstract In this study, double-layer S-shaped metamaterials （MMs） are analyzed by terahertz time-domain spectroscopy. These materials exhibit narrow bandstop and broad bandpass transmission properties at both horizontal and vertical electric-field polarizations. A 117% increase in the unloaded quality factor is experimen- tally observed for these materials. The center frequency is approximately 0.45 THz, with a 3-dB bandwidth of 0.52 THz from 0.20 to 0.72 THz at normal incidence. The measured average insertion loss is 0.5 dB with a ripple of 1 dB. These results show that double-layer S-shaped MMs are effective in designing tunable terahertz devices.