Acoustic topological circuitry in square and rectangular phononic crystals
File(s)
Published version
Author(s)
Makwana, Mehul P
Chaplain, Gregory J
Type
Journal Article
Abstract
We use square and rectangular phononic crystals to create experimental realizations of complex topological phononic circuits. The exotic topological transport observed is wholly reliant upon the underlying structure that must belong to either a square or rectangular lattice system and not to any hexagonal-based structure. The phononic system we use consists of a periodic array of square steel bars that partitions acoustic waves in water over a broadband range of frequencies (about
0.5
MHz). An ultrasonic transducer launches an acoustic pulse that propagates along a domain wall, before encountering a nodal point, from which the acoustic signal partitions towards three exit ports. Numerical simulations are performed to clearly illustrate the highly resolved edge states as well as corroborate our experimental findings. To achieve complete control over the flow of energy, we need to create power division and redirection devices. The tunability afforded by our designs, in conjunction with the topological robustness of the modes, will lead to incorporation into acoustical devices.
0.5
MHz). An ultrasonic transducer launches an acoustic pulse that propagates along a domain wall, before encountering a nodal point, from which the acoustic signal partitions towards three exit ports. Numerical simulations are performed to clearly illustrate the highly resolved edge states as well as corroborate our experimental findings. To achieve complete control over the flow of energy, we need to create power division and redirection devices. The tunability afforded by our designs, in conjunction with the topological robustness of the modes, will lead to incorporation into acoustical devices.
Date Issued
2021-05-25
Date Acceptance
2021-04-30
Citation
Physical Review Applied, 2021, 15, pp.1-13
ISSN
2331-7019
Publisher
American Physical Society
Start Page
1
End Page
13
Journal / Book Title
Physical Review Applied
Volume
15
Copyright Statement
© 2021 American Physical Society
Sponsor
Engineering and Physical Sciences Research Council
Identifier
https://journals.aps.org/prapplied/abstract/10.1103/PhysRevApplied.15.054056
Grant Number
EP/L016230/1
Subjects
Science & Technology
Physical Sciences
Physics, Applied
Physics
2-DIMENSIONAL PHOTONIC CRYSTAL
HIGH TRANSMISSION
EDGE STATES
WAVE-GUIDE
DESIGN
BENDS
SPIN
cond-mat.mes-hall
cond-mat.mes-hall
02 Physical Sciences
09 Engineering
Publication Status
Published
Date Publish Online
2021-05-25