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Broadband metasurfaces enabling arbitrarily large delay-bandwidth products

TitleBroadband metasurfaces enabling arbitrarily large delay-bandwidth products
Publication TypeJournal Article
Year of Publication2016
AuthorsGinis, V, Tassin, P, Koschny, T, Soukoulis, CM
JournalApplied Physics Letters
Date Published01
Type of ArticleArticle
ISBN Number0003-6951
Accession NumberWOS:000373055500013
Keywordsanalog, light-propagation, metamaterials, phase discontinuities, physics, reflection, refraction

Metasurfaces allow for advanced manipulation of optical signals by imposing phase discontinuities across flat interfaces. Unfortunately, these phase shifts remain restricted to values between 0 and 2 pi, limiting the delay-bandwidth product of such sheets. Here, we develop an analytical tool to design metasurfaces that mimic three-dimensional materials of arbitrary thickness. In this way, we demonstrate how large phase discontinuities can be realized by combining several subwavelength Lorentzian resonances in the unit cell of the surface. Our methods open up the temporal response of metasurfaces and may lead to the construction of metasurfaces with a plethora of new optical functions. (C) 2016 AIP Publishing LLC.

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Alternate JournalAppl. Phys. Lett.