We present a composite structure integrating meta-atom models with metamolecule architectures, which enables the realization of both multiband and broadband ATMs. By adjusting geometric parameters of the structures, the topological edge states can be isolated tuned in different frequencies. By superimposing two independently edge-state bands, a broadband topological state can be obtained based on Fano resonant coupling effects.

Changlin Ding is associate professor from Northwestern Polytechnical University (NWPU). He received his Bachelor’s degree in 2005 and Doctoral degree in 2011, both from NWPU. His research focuses on acoustic metamaterials, metasurfaces and topological acoustics. He has realized the modulation of effective material parameters, abnormal manipulation of acoustic waves, and regulation of topological states via superstructures. His research interests also cover applied research on sound-absorbing materials and environmental noise control. He has realized He has presided over 8 research projects at national, ministerial and provincial levels, and participated in 5 National Natural Science Foundation of China (NSFC) projects. He has published more than 50 SCI papers with over 1,100 citations. In addition, he has co-authored one monograph and one textbook.