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Multiple refraction switches realized by stretching elastomeric scatterers in sonic crystals
12.L. Feng, X. P. Liu, M. H. Lu, Y. B. Chen, Y. F. Chen, Y. W. Mao, J. Zi, Y. Y. Zhu, S. N. Zhu, and N. B. Ming, Phys. Rev. Lett. 96, 014301 (2006).
14.M. H. Lu, C. Zhang, L. Feng, J. Zhao, Y. F. Chen, Y. W. Mao, J. Zi, Y. Y. Zhu, S. N. Zhu, and N. B. Ming, Nat. Mater. 6, 744 (2007).
25.J. F. Robillard, O. B. Matar, J. O. Vasseur, P. A. Deymier, M. Stippinger, A. C. Hladky-Hennion, Y. Pennec, and B. Djafari-Rouhani, Appl. Phys. Lett. 95, 124104 (2009).
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The effect of out-of-plane pre-stretch on the 2D sonic crystal with stretchable elastomeric scatterers is explored. The hyperelastic scatterers are characterized by a compressible neo-Hookean model. The Dirichlet-to-Neumann (DtN) map is adopted to obtain the band structure and equi-frequency contours. We focus on the first passband and find that a variety of switching functionalities for refraction behaviors can be realized in selected frequencies under a specific pre-stretch range. These refraction switches enable an active control of wave propagation and are applicable in advanced technologies where switchable and multifunctional sonic crystals are required.
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