https://doi.org/10.1140/epjb/s10051-023-00618-8
Regular Article - Solid State and Materials
Valley edge states and chiral selective transport in reconfigurable phononic crystals
1
School of Computer Science and Information Engineering, Chongqing Technology and Business University, 400067, Chongqing, China
2
Chongqing Key Laboratory of Intelligent Perception and Block Chain Technology, Chongqing Technology and Business University, 400067, Chongqing, China
3
College of Optoelectronic Engineering, Chongqing University, 400044, Chongqing, China
Received:
12
September
2023
Accepted:
4
November
2023
Published online:
24
November
2023
Valley topological edge state has been extended from condensed matter physics to acoustics and rapidly developed, in which one-way propagation in valley topological phononic crystal is achieved breaking the spatial reversal symmetry. Here, we present a 2D hexagonal lattice phononic crystal with the reconfigurable scatters composed of three rectangle rods. By rotating its three-legged rods, two distinct valley edge states can be realised and the valley Hall topological transition phase also is triggered. We numerically simulate the projected band structures of the supercells including zigzag and armchair interface and verify the existence of valley edge states. We demonstrate the acoustic topological transport in the straight interface and sharply curved path. Then, in an across-interface, acoustic splitting and emerging are also observed. Furthermore, we design the complicated interfaces constructed by phononic crystals with distinct valley Hall topological phase. We verify the chiral selective transports in the oriented interface if the excited point source positioned at different interfaces. The chiral selective valley topological propagation of acoustic wave provides many potential applications in designing acoustic switch, splitter and acoustic waveguide.
Copyright comment Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
© The Author(s), under exclusive licence to EDP Sciences, SIF and Springer-Verlag GmbH Germany, part of Springer Nature 2023. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
