Wellenausbreitung in periodischen Strukturen und Mechanismen negativer Brechung

• Antragsteller: Professor Dr. Mario Ohlberger; Professor Dr. Ben Schweizer
• Fachliche Zuordnung: Mathematik
• Förderung: Förderung von 2014 bis 2018
• Projektkennung: Deutsche Forschungsgemeinschaft (DFG) - Projektnummer 258039653

• Erstellungsjahr: 2018

Zusammenfassung der Projektergebnisse

This research project was very successful in different fields. With the common interest in wave propagation in heterogeneous media, two research teams could interact and collaborate, they could share useful methods and they succeeded to deepen today’s knowledge on wave propagation in periodic structures and negative refraction. Some specific questions turned out to be of particular interest and much of the research efforts have been directed to these fields: 1.) Homogenization of periodic structures, 2.) Bloch wave analysis, 3.) Multi-scale methods. In the first field, the first mathematically rigorous derivation of a meta-material with negative refractive index was obtained. Moreover, the influence of the microstructure’s geometry on the homogenization results was investigated. The second field considers the expansion of solutions in Bloch waves to obtain appropriate radiation conditions in photonic crystals, which is also implemented in a numerical scheme. The third field embraces the design and numerical analysis of multi-scale methods, in particular the convergence of the schemes. Approaches for general heterogeneous media based on the Localized Orthogonal Decomposition have also been examined. The scientific output of this project is large (and, as a consequence, the number of publications is considerable). We emphasize that most publications have been made possible by some more informal exchange between the partners in this research project.

Projektbezogene Publikationen (Auswahl)

• A negative index meta-material for Maxwell’s equations. SIAM J. Math. Anal., 48(6):4155–4174, 2016
  A. Lamacz and B. Schweizer
  
• A new Heterogeneous Multiscale Method for time-harmonic Maxwell’s equations. SIAM J. Numer. Anal., 54(6):3493–3522, 2016
  P. Henning, M. Ohlberger, and B. Verfürth
  
• Effective Maxwell’s equations in general periodic microstructures. Applicable Analysis, 97(13):2210–2230, 2017
  B. Schweizer and M. Urban
  
• Localized Orthogonal Decomposition for two-scale Helmholtz-type problems. AIMS Mathematics, 2(3):458–478, 2017
  M. Ohlberger and B. Verfürth
  
• A Bloch wave numerical scheme for scattering problems in periodic waveguides. SIAM J. Numer. Anal., 56(3):1848–1870, 2018
  T. Dohnal and B. Schweizer
  
• A new Heterogeneous Multiscale Method for the helmholtz equation with high contrast. Mulitscale Model. Simul., 16(1):385–411, 2018
  M. Ohlberger and B. Verfürth
  
• Effective Maxwell’s equations for perfectly conducting split ring resonators. Arch. Ration. Mech. Anal., 229(3):1197–1221, 2018
  R. Lipton and B. Schweizer
  
• Numerical homogenization of H(curl)-problems. SIAM J. Numer. Anal., 56:1570–1596, 2018
  D. Gallistl, P. Henning, and B. Verfürth
  
• Outgoing wave conditions in photonic crystals and transmission properties at interfaces. ESAIM: Math. Model. Numer. Anal., 2018
  A. Lamacz and B. Schweizer