Backward-wave media (aliases: Veselago media, "left-handed" media, double negative media, media with negative material parameters)
We have been working for some time on t material modelling, characterization,
realization possibilities, electromagnetic phenomena, and potential
applications.
Backward-wave media? What is it?
We have found that negative refraction can be realized in chiral media
near a resonance of the refractive index. This means that it is not
nesessary to have negative values of the material parameters, which is
very important for optical applications, where realization of negative
permeability is very problematic. See a short explanation here.
A lot of material about negative refraction and related issues can
be found here: Sergei
Tretyakov, Analytical Modeling in
Applied Electromagnetics, Norwood, MA: Artech House,
2003.
See also our review paper: S.A.
Tretyakov, I.S. Nefedov, C.R.
Simovski, S.I. Maslovski, Modelling and microwave properties of
artificial materials with negative parameters, in Advances in
Electromagnetics of Complex Media and Metamaterials, S. Zouhdi, A.
Sihvola, and M. Arsalane (editors), NATO Series II: Mathematics,
Physics, and Chemistry, Vol. 89, Kluwer Academic Publishers, 2002, pp.
99-122.
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