%A Yuting W. CHEN,Xi-Cheng ZHANG %T Anti-reflection implementations for terahertz waves %0 Journal Article %D 2014 %J Front. Optoelectron. %J Frontiers of Optoelectronics %@ 2095-2759 %R 10.1007/s12200-013-0377-z %P 243-262 %V 7 %N 2 %U {https://journal.hep.com.cn/foe/EN/10.1007/s12200-013-0377-z %8 2014-06-25 %X

Undesired reflection caused by impedance mismatch can lead to significant power loss and other unwanted effects. In the terahertz regime, anti-reflection method has evolved from simple quarter-wave anti-reflection coating to sophisticated metamaterial device and photonic structures. In this paper, we examined and compared the theories and techniques of several anti-reflection implementations for terahertz waves, with emphasis on gradient index photonic structures. A comprehensive study is presented on the design, fabrication and evaluation of this new approach.