Broadband metasurfaces enabling arbitrarily large delay-bandwidth products | Zendy

Vincent Ginis | Zendy; Philippe Tassin | Zendy; Thomas Koschny | Zendy; Costas M. Soukoulis | Zendy

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Broadband metasurfaces enabling arbitrarily large delay-bandwidth products

Author(s) -

Vincent Ginis,

Philippe Tassin,

Thomas Koschny,

Costas M. Soukoulis

Publication year - 2016

Publication title -

applied physics letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.182

H-Index - 442

eISSN - 1077-3118

pISSN - 0003-6951

DOI - 10.1063/1.4939979

Subject(s) - classification of discontinuities , broadband , bandwidth (computing) , limiting , optics , phase (matter) , phase response , computer science , physics , true time delay , optoelectronics , telecommunications , engineering , mathematics , mechanical engineering , mathematical analysis , phased array , quantum mechanics , antenna (radio)

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 2π, 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.

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