https://doi.org/10.1140/epjp/s13360-024-05335-4
Regular Article
Three-channel acoustic switch based on topological phononic crystals
Optoelectronics and Nanophotonics Research Lab (ONRL), Faculty of Electrical Engineering, Sahand University of Technology, Tabriz, Iran
Received:
18
March
2024
Accepted:
3
June
2024
Published online:
13
July
2024
In this study, edge states with topological characteristics have been simulated using a square phononic crystal consisting of cross-shaped scatterers made of nickel placed in an air matrix. The achievement of topological phase transitions between various topological and ordinary phases is done by adjusting the angles of the scatterers without altering the lattice structure. A novel topological phononic crystal switch, with a controller for transitioning between different states, has been implemented with three input and three output ports. The switch has two types of scatterers with angles of 
and 
; 40 of these scatterers are assigned to the control region and can be rotated. The distinctive feature of this topological switch is its ability to transition between 6 different states, with a working frequency of 162.2 kHz. Also, in this study, laboratory test challenges like fabrication tolerance and spectral response effect are investigated which shows the high reliability.
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© The Author(s), under exclusive licence to Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2024. 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.
