Creating materials with a desired refraction coefficient

Details Creating materials with a desired refraction coefficient Creating materials with a desired refraction coefficient

2009-09-02

arxiv.org/abs/0909.0521v1

Physics

Mathematical Physics

Scientific paper

A method is given for creating material with a desired refraction coefficient. The method consists of embedding into a material with known refraction coefficient many small particles of size $a$. The number of particles per unit volume around any point is prescribed, the distance between neighboring particles is $O(a^{\frac{2-\kappa}{3}})$ as $a\to 0$, $0<\kappa<1$ is a fixed parameter. The total number of the embedded particle is $O(a^{\kappa-2})$. The physical properties of the particles are described by the boundary impedance $\zeta_m$ of the $m-th$ particle, $\zeta_m=O(a^{-\kappa})$ as $a\to 0$. The refraction coefficient is the coefficient $n^2(x)$ in the wave equation $[\nabla^2+k^2n^2(x)]u=0$.

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