Abstract
The topological pumping has been instrumental in advancing our understanding of topological phase transitions in various physical systems,which can be extended to uncover intriguing higher-order topological phases in the lower-dimensional system.Here,we propose a theoretical exploration of topological dipole pumping on an acoustic square superlattice by cyclically modulating intracell couplings,which shares the topological nature of an extended three-dimensional system with chiral hinge states.Using the multipole chiral numbers,we characterize the higher-order topological phases that arise during the evolution.The evolution of topological phase transitions is verified by numerical simulations and shows corner states are transferred across the bulk.Our findings can inspire the construction of chiral hinge states in artificial crystals,opening up new possibilities for the design of devices allowing the unidirectional propagation of sound.
基金项目
National Key R&D Program of China(2022YFA1404402)
National Natural Science Foundation of China(11634006)
National Natural Science Foundation of China(81127901)
High-Performance Computing Center of Collaborative Innovation Center of Advanced Microstructures()
Priority Academic Program Development of Jiangsu Higher Education Institutions()
维普
万方数据