Physics – Optics
Scientific paper
2010-05-11
Physics
Optics
13 pages, 1 table, 6 figures; minor changes in the title and text
Scientific paper
Transformation-media designed by standard transformation-optics (TO) approaches, based on real-valued coordinate-mapping, cannot exhibit single-negative (SNG) character unless such character is already possessed by the domain that is being transformed. In this paper, we show that, for a given field polarisation, pseudo-SNG transformation media can be obtained by transforming a domain featuring double positive (or double-negative) character, via complex analytic continuation of the coordinate transformation rules. Moreover, we apply this concept to the TO-based interpretation of phenomena analogous to the tunnelling effects observable in bi-layers made of complementary epsilon-negative (ENG) and mu-negative (MNG) media, and explore their possible TO-inspired extensions and generalizations.
Alu' Andrea
Castaldi Giuseppe
Engheta Nader
Galdi Vincenzo
Gallina Ilaria
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