Topological interface states by energy hopping within power-law variable section waveguides

Abstract

In this paper, a one-dimensional acoustical topology by energy hopping within power-law variable section waveguides (VSWG) is proposed, in which a topological phase transition occurs due to the energy in the basic unit hopping to the nearby unit with the same energy mode resulting that its energy band is closed first and then opened. This research can realize the enhanced sound energy at the topological interface state and further regulated sound energy on the basis of enhancing sound energy. The large open hole determine the wide frequency range where the designable topological interface state is constructed and the power-law of the curve of the structure can adjust the size of the common forbidden band of the two topological states, so as to further improve the bandwidth. The small open hole control the magnitude of the acoustic energy at the topological interface state. This research will provide guidance for designing acoustic devices with different frequencies, different acoustic energy concentrations and realizing engineering applications of other multifunctional acoustic devices.

Stepless space-regulation of topological acoustic controller with high fault tolerance

“…This undoubtedly opens new ideas for designing devices with lossless energy transmission and high fault tolerance. Recent research on electronic systems has stimulated the study of topological insulators in acoustic systems [32][33][34][35][36][37][38][39][40][41][42][43][44][45][46]. Because the symmetry of artificial crystals facilitates flexible clipping, the acoustic Quantum Valley Hall effect (AVH) [47] has received increasing attention [48][49][50][51].…”