,Design and theoretical study of a polarization-insensitive multiband terahertz metamaterial bandpas

• 作 者: Hai-Peng Li Wen-Yue Fu Xiao-Peng Shen Kui Han Wei-Hua Wang
• 机 构: School of Physical Science and Technology, China University of Mining and Technology, Xuzhou 221116,
• 出 处: 中国物理B（英文版）
• 发表日期: 2017年12期
• 关键词: terahertz metamaterials bandpass filter full-wave simulation multi-reflection in

We report the design of a novel multiband metamaterial bandpass filter (BPF) in the terahertz (THz)-wave region.The designed BPF is composed of a metal-dielectric-metal sandwiched structure with three nested rings on the top surface and a cross structure on the bottom surface.Full-wave simulation results show that the designed BPF has three transmission peaks at frequencies of 0.42,1.27,and 1.86 THz with transmission rates of-0.87,-1.85,and-1.83 dB,respectively.Multi-reflection interference theory is introduced to explain the transmission mechanism of the designed triple-band BPF.The theoretical transmission spectrum is in good agreement with the full-wave simulated results.The designed BPF can maintain a stable performance as the incident angle varies from 0℃ to 30℃ for both transverse electric and transverse magnetic polarizations of the incident wave.The designed BPF can be potentially used in THz devices due to its multiband transmissions,polarization insensitivity,and stable wide-angle response in the THz region.