22 February 2017 Optical propagation in anisotropic metamaterials
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Abstract
Anisotropic metamaterials are widely used in the field of optics because of their unique electromagnetic properties. These metamaterials can be made from multilayer metallo-dielectric structures. Such stacks can be represented as an anisotropic bulk medium using effective medium theory. Optical properties of anisotropic media are mostly described in terms of effective parameters such as permittivity and permeability, or alternatively, refractive index and characteristic impedance. These properties depend not only on the wavelength and polarization but also the direction of the optical wave-vector. In this work optical wave propagation through such anisotropic media is studied in detail. The Berreman 4 × 4 matrix along with appropriate boundary conditions is used to determine all electric and magnetic fields inside and outside the structure. The overall transmission and reflection are investigated as a function of the thickness of each layer (metal/dielectric), the number of layers, and the wavelength for oblique incidence. The validity of the effective medium theory is also investigated by changing the thickness and number of layers.
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Rudra Gnawali, Rudra Gnawali, Partha P. Banerjee, Partha P. Banerjee, Joseph W. Haus, Joseph W. Haus, Dean R. Evans, Dean R. Evans, } "Optical propagation in anisotropic metamaterials", Proc. SPIE 10098, Physics and Simulation of Optoelectronic Devices XXV, 100981F (22 February 2017); doi: 10.1117/12.2255757; https://doi.org/10.1117/12.2255757
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