Spectral super-resolution in metamaterial composites

Details Spectral super-resolution in metamaterial composites Spectral super-resolution in metamaterial composites

2011-05-25

arxiv.org/abs/1105.5012v1

Physics

Optics

17 pages, 6 figures

Scientific paper

We investigate the optical properties of periodic composites containing metamaterial inclusions in a normal material matrix. We consider the case where these inclusions have sharp corners, and following Hetherington and Thorpe, use analytic results to argue that it is then possible to deduce the shape of the corner (its included angle) by measurements of the absorptance of such composites when the scale size of the inclusions and period cell is much finer than the wavelength. These analytic arguments are supported by highly accurate numerical results for the effective permittivity function of such composites as a function of the permittivity ratio of inclusions to matrix. The results show that this function has a continuous spectral component with limits independent of the area fraction of inclusions, and with the same limits for both square and staggered square arrays.

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