Abstract
The propagation of acoustic waves in two-dimensional sonic crystals (SC) is studied theoretically. Effects of elliptical rod orientations on the acoustic band gaps in periodic arrays of rigid solid rods embedded in a polar liquid are investigated. We have found that the pass bands and forbidden bands of the sonic crystals can be changed by utilizing the rotational anisotropy of the structure factor at different rotation angles of the scatterers. The plane wave expansion (PWE) method is used to calculate the band structure. The variation of the absolute band gap was also investigated as a function of any filling fraction at a fixed orientation of the elliptical columns. The gap-tuning effect can be controlled by the rotational asymmetry and eccentricity of the scatterers.
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The author (Ekmel Ozbay) acknowledges partial support from the Turkish Academy of Sciences.
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Oltulu, O., Mamedov, A.M. & Ozbay, E. Band gap structure of elliptic rods in water for a 2D phononic crystal. Appl. Phys. A 123, 212 (2017). https://doi.org/10.1007/s00339-016-0734-z
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DOI: https://doi.org/10.1007/s00339-016-0734-z