Homogenization of dispersive material parameters for Maxwell's equations using a singular value decomposition
Author
Summary, in English
We find effective, or homogenized, material parameters for Maxwell's equations when the microscopic scale becomes small compared to the scale induced by the frequencies of the imposed currents. After defining a singular value decomposition of the non-self-adjoint partial differential operator, we expand the electromagnetic field in the modes corresponding to the singular values and show that only the smallest singular values make a significant contribution to the total field when the scale is small. The homogenized material parameters can be represented with the mean values of the singular vectors through a simple formula, which is valid for wavelengths not necessarily infinitely large compared to the unit cell.
Publishing year
2005
Language
English
Pages
760-789
Publication/Series
Multiscale Modeling & Simulation
Volume
4
Issue
3
Document type
Journal article
Publisher
Society for Industrial and Applied Mathematics
Topic
- Electrical Engineering, Electronic Engineering, Information Engineering
Keywords
- Maxwell's equations
- singular value decomposition
- homogenization
- Bloch waves
- dispersive media
Status
Published
ISBN/ISSN/Other
- ISSN: 1540-3459