Physics – Optics
Scientific paper
2009-05-11
Phys. Rev. E 80, 016604 (2009)
Physics
Optics
19 pages, 9 figures
Scientific paper
10.1103/PhysRevE.80.016604
An analytical method of electromagnetic wave interactions with a general radially anisotropic cloak is established. It is able to deal with arbitrary parameters ($\epsilon_r(r)$, $\mu_r(r)$, $\epsilon_t(r)$ and $\mu_t(r)$) of a radially anisotropic inhomogeneous shell. The general cloaking condition is proposed from the wave relations for the first time. We derive the parameters of a novel class of spherical nonlinear cloaks and examine its invisibility performance by the proposed method at various nonlinear situations. Spherical metamaterial cloaks with improved invisibility performance is achieved with optimal nonlinearity in transformation and core-shell ratio.
Ma Hua
Novitsky Andrey
Qiu Cheng-Wei
Qu Shaobo
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