Design of negative-refractive-index materials on the basis of rods with a gradient of the dielectric constant
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SERGENTU, Vladimir, URSACHI, Veaceslav, TIGINYANU, Ion, FOCA, F., FOLL, Helmut, BOYD, Robert W.. Design of negative-refractive-index materials on the basis of rods with a gradient of the dielectric constant. In: Applied Physics Letters, 2007, vol. 91, p. 0. ISSN 0003-6951. DOI: https://doi.org/10.1063/1.2770964
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Applied Physics Letters
Volumul 91 / 2007 / ISSN 0003-6951

Design of negative-refractive-index materials on the basis of rods with a gradient of the dielectric constant
DOI:https://doi.org/10.1063/1.2770964

Pag. 0-0

Sergentu Vladimir1, Ursachi Veaceslav1, Tiginyanu Ion1, Foca F.2, Foll Helmut2, Boyd Robert W.3
 
1 Institute of Applied Physics, Academy of Sciences of Moldova,
2 Christian-Albrechts University of Kiel,
3 University of Rochester
 
 
Disponibil în IBN: 10 aprilie 2018
Rezumat

The authors propose an approach to the design of negative-refractive-index materials based on the use of dielectric rods with a gradient of the dielectric constant. A triangular-lattice photonic crystal assembled from multilayer dielectric rods with a refractive index approximating a fish-eye profile is shown to exhibit a negative refractive index in the wavelength range defined by the inequality 0.67<aλ<0.83, where a is the lattice constant of the photonic crystal. A lens consisting of a plane-parallel slab of such a photonic crystal slab is shown to be able to form an image of a point source in this wavelength range. According to the calculations, particularly high-quality images can be obtained at the wavelength λ= (32) a, where the fish-eye dielectric rods scatter the light like a medium with the refractive index equal to -0.85.
Cuvinte-cheie
Lattice constants, Permittivity, refractive index, Wavelength, Image quality, light scattering

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