Title :
Terahertz metamaterial absorber using asymmetric resonator
Author :
Wen, Yongzheng ; Ma, Wei ; Bailey, Joe ; Matmon, Guy ; Aeppli, Gabriel ; Yu, Xiaomei
Author_Institution :
National Key Laboratory of Science and Technology on Micro/Nano Fabrication, Institute of Microelectronics, Peking University, Beijing 100871, China
Abstract :
A terahertz (THz) absorber using asymmetric split ring resonators (ASRs) was designed, fabricated and characterized. As the symmetry of a split ring resonator (SRR) is broken, the trapped mode resonance is excited, which shows higher absorption and Q factor than the dipole resonance of the symmetric resonator. By displacing the gap from center by 0.5µm, an absorber with the highest measured absorptivity of 0.99 is realized. The bandwidth of 0.61THz with the absorptivity beyond 0.9 is 2.5 times as wide as that of the symmetric dipole peak.
Keywords :
Absorption; Bandwidth; Gold; Metamaterials; Physics; Q-factor; Resonant frequency; Absorber; THz technology; asymmetry; metamaterial; trapped mode;
Conference_Titel :
Microwave Conference (APMC), 2014 Asia-Pacific
