Manipulation of Acoustic Waves Based on Coupled-Resonator Acoustic Waveguides

International audienceGuidance in a sonic or phononic crystal is not limited to linear lines of defects. Actually, any chain of defects acting as cavities can become a waveguide, providing the cavities are not too far away from one another and they have the same initial resonant frequency. This is the basic idea of the coupled-resonator acoustic waveguide. Here, we first investigate dispersion relations of CRAWs based on a two-dimensional phononic crystal composed of cylindrical mercury in water in a square lattice. Cavity is introduced by replacing one mercury cylinder with water. Then, transmission properties of CRAWs with different circuits are examined. Numerical results suggest that manipulation of acoustic waves can be realized based on CRAWs. The work is this paper is relevant to the design of new acoustic wave devices