Non-Conventional Anderson Localization in Bilayered Structures with Metamaterials

Details Non-Conventional Anderson Localization in Bilayered Structures with Metamaterials Non-Conventional Anderson Localization in Bilayered Structures with Metamaterials

2011-11-15

arxiv.org/abs/1111.3397v1

Physics

Condensed Matter

Disordered Systems and Neural Networks

5 pages, 3 figures

Scientific paper

We have developed an approach allowing us to resolve the problem of non-conventional Anderson localization emerging in bilayered periodic-on-average structures with alternating layers of right-handed and left-handed materials. Recently, it was numerically discovered that in such structures with weak fluctuations of refraction indices, the localization length $L_{loc}$ can be enormously large for small wave frequencies $\omega$. Within the fourth order of perturbation theory in disorder, $\sigma^2 \ll 1$, we derive the expression for $L_{loc}$ valid for any $\omega$. In the limit $\omega \rightarrow 0$ one gets a quite specific dependence, $L^{-1}_{loc} \propto \sigma ^4 \omega^8$. Our approach allows one to establish the conditions under which this effect can be observed.

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