4 papers
Topological Rainbow Trapping for Spatial-frequency Demultiplexing of Underwater Acoustic Signals
Cheng Lin, Yangkai Liu, Tuo Liu +3
Efficient separation and localization of multifrequency acoustic waves are essential for underwater target recognition and acoustic energy harvesting. The underwater implementation…
Elastic Trapped States at Dislocation Defects in Scaled Coupling and Hofstadter Models
Yangkai Liu, Cheng Lin, Yuan Liu +4
Elastic topological dislocations provide a pathway for trapping elastic wave energy at internal defects, rather than being confined solely to external boundaries or corners, which…
Chiral Landau levels induced by two in-plane pseudomagnetic fields in underwater acoustic metamaterials
Jiao Shen, Zhiyong Chang, Xinzong Wang +6
The paper demonstrates how to create and control chiral zeroth Landau levels in underwater acoustic metamaterials by using two perpendicular in‑plane pseudomagnetic fields, enablin…
Experimental Realization of Type-II Quadrupole Topological Insulator
Yuan Liu, Yangkai Liu, Cheng Lin +4
The discovery of quadrupole topological insulators (QTIs) has spurred extensive research into higher-order topological phases. Recently proposed type-II QTIs exhibit unconventional…