Journal
JOURNAL OF THE EUROPEAN OPTICAL SOCIETY-RAPID PUBLICATIONS
Volume 5, Issue -, Pages -Publisher
EUROPEAN OPTICAL SOC
DOI: 10.2971/jeos.2010.10010
Keywords
metamaterials; homogenization theory; Bloch waves
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Funding
- Danish Research Council for Technology and Production Sciences [274-06-0507, 274-07-0080]
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We show how branch ambiguities in the extraction of effective parameters is arising as a direct consequence of the underlying Bloch state physics. The mutual importance of the different branches in general depends on the experimental context, and we show how the Fourier spectrum of the field inside the metamaterial can be used to access this. Different numerical examples illustrate how a predominant branch may be identified for lambda >> a while at higher frequency the power may be distributed over more branches. This is in particular true near band-edges and strong resonances. Extensions to two- and three-dimensional metamaterial designs are discussed. [DOI: 10.2971/jeos.2010.10010]
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