Constructing topological states based on the physical concepts in quantum systems is one of the most frontier projects in acoustic researches.In this work,acoustic quadrupole topological insulators are real-ized by designing specific metamaterial unit-cells by analyzing the topological properties and choosing proper stripe geometry,anomalous chiral edge states are constructed in acoustic quadrupole topological insulators.Furthermore,acoustic topological devices supporting such chiral edge states are designed and the numerical calculated results reveal that the chiral edge states are well-localized and immune to the geometrical defects.The proposed topological devices possess promising applications on advanced wave manipulation,acoustic communication and noise and vibration control.
关键词
声学超材料/四极子拓扑绝缘体/手征边界态
Key words
Acoustic metamaterial/Quadrupole topological insulator/Chiral edge state
维普
万方数据