Complex Resolvent Band Structure of Phononic Crystals
Résumé
We examine the extension of the definition of the resolvant band structure (RBS) to complex wavenumbers and complex frequencies. The RBS is obtained by applying a stochastic excitation to the unit-cell of a crystal and monitoring the response in dispersion space. It is found that the poles of the RBS appear in complex dispersion space around the complex band structure.
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