Broadband and perfect terahertz absorber based on multilayer metamaterial with cross-ring patterned structures  

作　　者：WEN Jin LIU Zhanzhi WU Zhengwei PAN Yu ZHANG Ying 

机构地区：[1]School of Science,Xian Shiyou University,Xi'an 710065,China [2]Shaanxi Key Laboratory of Measurement and Control Technology for Oil and Gas Wells,Xi'an 710065,China

出　　处：《Optoelectronics Letters》2025年第1期1-6,共6页光电子快报(英文版)

基　　金：supported by the National Natural Science Foundation of China(No.61505160);the Innovation Capability Support Program of Shaanxi(No.2018KJXX-042);the Natural Science Basic Research Program of Shaanxi(No.2019JM-084);the State Key Laboratory of Transient Optics and Photonics(No.SKLST202108)。

摘　　要：Broadband and perfect terahertz absorber based on multilayer metamaterial using cross-ring patterned structures is proposed and investigated.The structure of the absorber is double absorption layers consisting of a chromium cross ring and eight isosceles right triangles.The unique structure of the double absorbing layers excites the electric dipole multimode resonance,giving rise to high absorption performance.Meanwhile,the influence of construal parameters on absorber behavior is also discussed.The numerical results show that the absorption achieves over 90%ranging from 2.45 THz to 6.25 THz and 99%absorption in the range of 3.7—5.3 THz.The realization of broadband and perfect absorber is described using the impedance matching principle.It is obviously found that the absorber is insensitive to the high angle of incidence for both transverse electric(TE)and transverse magnetic(TM)polarizations.Compared with the former reports,this absorber has remarkable improved absorption efficiency and smaller period.The terahertz absorber may be found applications in the fields of energy capture and thermal detection.

关 键 词：polarization ABSORBER PERFECT 

分 类 号：O441.4[理学—电磁学]