Composite Metamaterials for THz Perfect Absorption

Metamaterials By combining the three kinds of structures (rectangles, rings and cross structures) into one unit, a triple‐band THz absorber is successfully demonstrated. Three absorption peaks are observed at 0.537, 0.948, and 1.59 THz with the respective absorption of 95.7, 98.8, and 96%. The physical mechanism of the perfect absorption is elucidated by the interference theory combining with transmission line model. It is found that each structures produce perfect absorption with the same mechanism, but with different absorption frequencies, which has an important application in multi‐band THz absorption devices and thus provides guidance for the design of multi‐band composite metamaterials absorbers. More details can be found in article number 1800940 by Yue Wang, Zijian Cui, Dongying Zhu, and Lisha Yue.