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Creators/Authors contains: "Perera, Ruchira"

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  1. ; (, Journal of Differential Equations)
    Full Text Available 
  2. ; (, ArXivorg)
    Analytic representation formulas and power series are developed to describe the band struc- ture inside periodic elastic crystals made from high contrast inclusions. We use source free modes associated with structural spectra to represent the solution operator of the Lam ́e system inside phononic crystals. Convergent power series for the Bloch wave spectrum are obtained using the representation formulas. An explicit bound on the convergence radius is given through the structural spectra of the inclusion array and the Dirichlet spectra of the inclusions. Suffi- cient conditions for the separation of spectral branches of the dispersion relation for any fixed quasi-momentum are identified. A condition is found that is sufficient for the emergence of band gaps. 
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    Accepted Manuscript Full Text Available