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arXiv · 2008.09542

Asymmetric surface wave excitation through metasurface-edge diffraction

Miguel Camacho·Filippo Capolino·Matteo Albani
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Abstract

The selective excitation of localized surface wave modes remains a challenge in the design of both leaky-wave and bound-wave devices. In this Letter, we show how the truncation of a metasurface can play an important role in breaking the spatial inversion symmetry in the excitation of surface waves supported by the structure. This is done by combining a large anisotropy in the dispersion relation and the presence of an edge which also serves as a coupling mechanism between the plane wave excitation and the induced surface waves. By resorting to the exact solution of the scattering problem based on a discrete Wiener-Hopf technique we show that by inverting the component of the impinging wavevector parallel to the truncation, two distinct surface waves are excited.

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Miguel Camacho, Filippo Capolino, Matteo Albani. 2020-08-21. Asymmetric surface wave excitation through metasurface-edge diffraction. https://doi.org/10.1364/ol.398342

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