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- W4306815763 abstract "Elastic waves scattering off a periodic single and double array of thin cylindrical defects is considered for isotropic materials. An analytical expression for the scattering matrix is obtained by means of the Lippmann-Schwinger formalism and analyzed in the long wavelength limit using Schloemilch series in order to obtain explicit expressions for the poles of the scattering matrix. The latter is then used to prove that for a specific curve in the space of physical and geometric parameters, the scattering is dominated by resonances, and the width of the resonances in the shear mode parallel to the cylinders has a global minimum in parameter space. This a feature is not observed in similar photonic or acoustic systems. The resonances in shear and compression modes that are coupled in the plane perpendicular to the cylinders due to the normal traction boundary condition are studied for the double array. The analytical dependence of the width of these resonances on physical and geometrical parameters is exploited to prove the existence of resonances with the vanishing width, known as Bound States in the Continuum (BSC). Spectral characteristics of BSC are explicitly found in terms of the Bloch phase and group velocities of elastic modes." @default.
- W4306815763 created "2022-10-20" @default.
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- W4306815763 date "2022-10-14" @default.
- W4306815763 modified "2023-10-16" @default.
- W4306815763 title "Elastic Wave Scattering off a Single and Double Array of Periodic Defects" @default.
- W4306815763 doi "https://doi.org/10.48550/arxiv.2210.08177" @default.
- W4306815763 hasPublicationYear "2022" @default.
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