Volume 56, Number 5, September-October 2022
|Page(s)||1483 - 1519|
|Published online||20 July 2022|
Bloch waves in high contrast electromagnetic crystals
Department of Mathematics, Louisiana State University, Baton Rouge, LA 70803, USA
2 Department of Mathematics & Statistics, Swarthmore College, Swarthmore, PA 19081, USA
3 Department of Mathematics, Colgate University University, Hamilton, NY 13346, USA
4 Department of Mathematical Sciences, University of Massachusetts Lowell, Lowell, MA 01854, USA
* Corresponding author: firstname.lastname@example.org
Accepted: 29 April 2022
Analytic representation formulas and power series are developed describing the band structure inside non-magnetic periodic photonic three-dimensional crystals made from high dielectric contrast inclusions. Central to this approach is the identification and utilization of a resonance spectrum for quasiperiodic source-free modes. These modes are used to represent solution operators associated with electromagnetic and acoustic waves inside periodic high contrast media. A convergent power series for the Bloch wave spectrum is recovered from the representation formulas. Explicit conditions on the contrast are found that provide lower bounds on the convergence radius. These conditions are sufficient for the separation of spectral branches of the dispersion relation for any fixed quasi-momentum.
Mathematics Subject Classification: 35J15 / 78A40 / 78A45
Key words: Bloch waves / band structure / high contrast / periodic medium
© The authors. Published by EDP Sciences, SMAI 2022
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