META 2021, META'12

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Spatial filtering and complex isofrequency contours in phononic crystals
V. Romero-Garcia, A. Cebrecos, R. Pico, V. J. Sanchez-Morcillo, K. Staliunas

Last modified: 2011-12-30


Spatially modulated materials are characterized by both the temporal dispersion relation and the spatial dispersion relation. In this work we pay attention on the interpretation of the spatial filtering taking into account the presence of the evanescent waves. Extended plane wave expansion is used to calculate the isofrequency contours and the predictions are in good agreement with the Multiple Scattering simulations.