Acoustic topological circuitry in square and rectangular phononic crystals - Archive ouverte HAL
Communication Dans Un Congrès Année : 2021

Acoustic topological circuitry in square and rectangular phononic crystals

Résumé

We systematically engineer a series of 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 which must belong to either a square or rectangular lattice system and not to any hexagonal-based structure. The phononic system chosen consists of a periodic array of square steel bars which partitions acoustic waves in water over a broadband range of frequencies (∼0.5MHz). An ultrasonic transducer launches an acoustic pulse which 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, power division and redirection devices are required. The tunability afforded by our designs, in conjunction with the topological robustness of the modes, will result in their assimilation into acoustical devices.
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Dates et versions

hal-03456168 , version 1 (29-11-2021)

Identifiants

  • HAL Id : hal-03456168 , version 1

Citer

Nicolas Laforge, Richard Wiltshaw, Richard V Craster, Vincent Laude, Julio Andrés Iglesias Martinez, et al.. Acoustic topological circuitry in square and rectangular phononic crystals. SIAM Conference on Mathematical Aspects of Materials Science, May 2021, Las Vegas, United States. ⟨hal-03456168⟩
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