Title :
Bandwidth enhanced metamaterial absorber at terahertz frequency
Author :
Huan Zhang ; Yijun Feng
Author_Institution :
Dept. of Electron. Eng., Nanjing Univ., Nanjing, China
Abstract :
In this paper a metamaterial electromagnetic (EM) wave absorber with unit cell composed of four circular metallic plates is reported, which can absorbing EM energy at terahertz (THz) frequency with enhanced bandwidth. By properly designing the size of the four plates, the relative bandwidth is increased to 41.3% due to the multi-resonance effect. The performance of the absorber is demonstrated by full-wave simulation and experimentally verified by reflection measurement with a THz time-domain spectroscopy. The measurement also indicates the designed THz absorber is polarization insensitive and works with wide incidence angles.
Keywords :
electromagnetic wave absorption; electromagnetic wave polarisation; electromagnetic wave reflection; terahertz metamaterials; EM; EM energy absorption; THz time-domain spectroscopy; bandwidth enhanced metamaterial electromagnetic wave absorber; circular metallic plate; full-wave simulation; multiresonance effect; reflection measurement; terahertz frequency; wide incidence angle; Bandwidth; Fabrication; Frequency measurement; Metals; Metamaterials; Reflection; Reflectivity;
Conference_Titel :
Metamaterials (Meta), 2012 International Workshop on
Conference_Location :
Nanjing
Print_ISBN :
978-1-4673-2807-4
DOI :
10.1109/META.2012.6464931
