Arbitrary beam control using passive lossless metasurfaces enabled by orthogonally polarized custom surface waves

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Volume Title
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Date
2018-01-30
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Mcode
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Language
en
Pages
11
Series
Physical Review B, Volume 97, issue 3
Abstract
For passive, lossless impenetrable metasurfaces, a design technique for arbitrary beam control of receiving, guiding, and launching is presented. Arbitrary control is enabled by a custom surface wave in an orthogonal polarization such that its addition to the incident (input) and the desired scattered (output) fields is supported by a reactive surface impedance everywhere on the reflecting surface. Such a custom surface wave (SW) takes the form of an evanescent wave propagating along the surface with a spatially varying envelope. A growing SW appears when an illuminating beam is received. The SW amplitude stays constant when power is guided along the surface. The amplitude diminishes as a propagating wave (PW) is launched from the surface as a leaky wave. The resulting reactive tensor impedance profile may be realized as an array of anisotropic metallic resonators printed on a grounded dielectric substrate. Illustrative design examples of a Gaussian beam translator-reflector, a probe-fed beam launcher, and a near-field focusing lens are provided.
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Kwon , D H & Tretyakov , S A 2018 , ' Arbitrary beam control using passive lossless metasurfaces enabled by orthogonally polarized custom surface waves ' , Physical Review B , vol. 97 , no. 3 , 035439 . https://doi.org/10.1103/PhysRevB.97.035439