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arXiv · 1408.6121

Time- and space-variant wave transmission in helicoidal phononic crystals

F. Li·C. Chong·J. Yang·P. G. Kevrekidis·C. Daraio
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Abstract

We present a dynamically tunable mechanism of wave transmission in 1D helicoidal phononic crystals in a shape similar to DNA structures. These helicoidal architectures allow slanted nonlinear contact among cylin- drical constituents, and the relative torsional movements can dynamically tune the contact stiffness between neighboring cylinders. This results in cross-talking between in-plane torsional and out-of-plane longitudinal waves. We numerically demonstrate their versatile wave mixing and controllable dispersion behavior in both wavenumber and frequency domains. Based on this principle, a suggestion towards an acoustic configuration bearing parallels to a transistor is further proposed, in which longitudinal waves can be switched on/off through torsional waves.

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F. Li, C. Chong, J. Yang, P. G. Kevrekidis, C. Daraio. 2014-08-26. Time- and space-variant wave transmission in helicoidal phononic crystals. https://arxiv.org/abs/1408.6121

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