Negative refraction of acoustic waves in two-dimensional sonic crystals

2005 ◽  
Vol 72 (3) ◽  
Author(s):  
Liang Feng ◽  
Xiao-Ping Liu ◽  
Yan-Bin Chen ◽  
Zhi-Peng Huang ◽  
Yi-Wei Mao ◽  
...  
Keyword(s):  
Acoustic Waves ◽  
Negative Refraction ◽  
Two Dimensional ◽  
Sonic Crystals

scholarly journals All-angle negative refraction for surface acoustic waves in pillar-based two-dimensional phononic structures

2012 ◽  
Vol 14 (12) ◽  
pp. 123030 ◽  
Author(s):  
Mohammed A Al-Lethawe ◽  
Mahmoud Addouche ◽  
Abdelkrim Khelif ◽  
Sébastien Guenneau
Keyword(s):  
Acoustic Waves ◽  
Negative Refraction ◽  
Surface Acoustic Waves ◽  
Two Dimensional

scholarly journals Negative Refraction of Acoustic Waves in a Two-Dimensional Phononic Crystal via FDTD Simulation

2009 ◽  
Vol 50 (5) ◽  
pp. 1004-1007 ◽  
Author(s):  
Tomoyuki Kurose ◽  
Kenji Tsuruta ◽  
Chieko Totsuji ◽  
Hiroo Totsuji
Keyword(s):  
Acoustic Waves ◽  
Negative Refraction ◽  
Phononic Crystal ◽  
Fdtd Simulation ◽  
Two Dimensional

Deterministic interface modes in two-dimensional acoustic systems

2020 ◽  
pp. 2150010
Author(s):  
Shao-Yong huo ◽  
Hong-Bo Huang ◽  
Lin-Jun Wang ◽  
Jiu-Jiu Chen
Keyword(s):  
Phase Transitions ◽  
Acoustic Waves ◽  
Tight Binding ◽  
Interface State ◽  
Interface States ◽  
Square Lattice ◽  
Two Dimensional ◽  
Practical Applications ◽  
Acoustic Interface ◽  
Sonic Crystals

The interface state in two-dimensional (2D) sonic crystals (SCs) was obtained based on trying or cutting approach, which greatly limits its practical applications. In this paper, we theoretically demonstrate that one category of interface states can deterministically exist at the boundary of two square-lattice SCs due to the geometric phase transitions of bulk bands. First, we derive a tight-binding formalism for acoustic waves and introduce it into the 2D case. Furthermore, the extended 2D Zak phase is employed to characterize the topological phase transitions of bulk bands. Moreover, the topological interface states can be deterministically found in the nontrivial bandgap. Finally, two kinds of SCs with the [Formula: see text] symmetry closely resembling the 2D Su–Schrieffer–Heeger (SSH) model are proposed to realize the deterministic interface states. We find that tuning the strength of intermolecular coupling by contacting or expanding the scatterers can effectively induce the bulk band inversion between the trivial and nontrivial crystals. The presence of acoustic interface states for both cases is further demonstrated. These deterministic interface states in 2D acoustic systems will be a great candidate for future waveguide applications.

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