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Terahertz metalenses for evanescent wave focusing and super-resolution imaging

Heng-He Tang and Pu-Kun Liu

Journal of Electromagnetic Waves and Applications, 2015, vol. 29, issue 13, 1776-1784

Abstract: Super-resolution focusing in the metamaterials for both the propagating and evanescent wave emerging from free space is demonstrated based on the gradient-index (GRIN) metalenses. The theoretical investigation reveals that the evanescent wave in free space can be transformed into propagating wave in the metamaterial due to the specific dispersion of the metamaterial. So spatial Fourier transform (FT) with broad input angular spectrum are achieved when the metamaterials are designed with GRIN. Furthermore, the application of super-resolution imaging based on the spatial FT is also presented.

Date: 2015
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DOI: 10.1080/09205071.2015.1061957

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Journal of Electromagnetic Waves and Applications is currently edited by Mohamad Abou El-Nasr and Pankaj Kumar Choudhury

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