Strong focusing properties and far-field focus in the two-dimensional photonic-crystal-based concave lens.

Abstract

We have demonstrated that the strong and far-field focusing of a point source and a plane wave in a two-dimensional photonic-crystal-based concave lens by the use of the standard finite-difference time-domain simulations. The effect of the distance between the point source and the lens on the focusing is discussed. The far-field focus of a plane wave is… (More)

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