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N -layered glass-anisotropic metamaterial-semiconductor cylinder model and designations
Source publication
We present here dependencies of scattered and absorbed powers of incident perpendicularly and parallel polarized microwaves by a multilayered cylinder. We consider here the normal (angle θ=90∘) and oblique (angles θ=60∘,30∘,5∘) incidence of microwave on the cylinder. The one consists of a glass core that is coated by the six anisotropic metamateria...
Contexts in source publication
Context 1
... equations for the multilayer cylinder was carried out by the partial area method [12][13][14]. The central core of the multi- layered cylinder was made of glass material. The glass core is coated by a sandwich semiconductor-metamaterial cover. The multilayered cylinder consists of seven concentric sur- faces with radii R j , j = 1, 2, . . . , N (Fig. 1). The every j th region is filled with a material having the permittivity ε j and the permeability μ j . Numbering of layers is going from the outside layer to the inner one. Thus, R 1 is the outside radius of the cylinder. In our calculations N = 7, i.e., the glass core with radius R 7 is coated with 6 layers of metamaterial and n- Si ...
Context 2
... in the plane x0z and the direction of microwave propagation is described by an angle θ between the z-axis and the wave vector k (Fig. 1). Here, E 0 is the amplitude of the electric field of an incident microwave. The vector E 0 determines the polarization of the incident microwave. The direction of vector E 0 is defined by the angle ψ that is between the vector E 0 and the y-axis. The EM wave has the parallel polarization when the angle ψ is equal to 90 • ...
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Citations
Engineered core-shell cylinders are good candidates for applications in invisibility and cloaking.In particular, hyperbolic nanotubes demonstrate tunable ultra-low scattering cross section in the visible spectral range. In this work we investigate the limits of validity of the condition for invisibility, which was shown to rely on reaching an epsilon near zero in one of the components of the effective permittivity tensor of the anisotropic metamaterial cavity. For incident light polarized perpendicularly to the scatterer axis, critical deviations are found in low-birefringent arrangements and also with high-index cores. We demonstrate that the ability of anisotropic metallodielectric nanocavities to dramatically reduce the scattered light is associated with a multiple Fano-resonance phenomenon. We extensively explore such resonant effect to identify tunable windows of invisibility.
