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Proceedings Paper

Low-loss bianisotropic metamaterials for time reversal
Author(s): Nitish Chandra
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Paper Abstract

We discuss the design of two complimentary media for analog detection of sources placed at subwavelength separation using time reversal of observed signals. We have used two metasurfaces composed of bianisotropic structures to code and decode the evanescent fields of the sources to propagating waves. In order to reduce losses and create a perfect focus, resonances are avoided to achieve negative index. We have studied various shapes such as, split ring resonators to determine the least lossy structure for time reversal. We have used simulations to study the behavior of permittivity and permeability values of these structures at various frequencies. Shape parameters such as size of the gap and thickness is being optimized to achieve refractive index of ± 1 at the same frequency and minimize losses in the metasurfaces.

Paper Details

Date Published: 21 February 2018
PDF: 7 pages
Proc. SPIE 10542, High Contrast Metastructures VII, 1054208 (21 February 2018); doi: 10.1117/12.2289170
Show Author Affiliations
Nitish Chandra, Univ. of North Carolina at Charlotte (United States)

Published in SPIE Proceedings Vol. 10542:
High Contrast Metastructures VII
Connie J. Chang-Hasnain; Andrei Faraon; Fumio Koyama; Weimin Zhou, Editor(s)

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