Omega-bianisotropic metasurface for converting a propagating wave into a surface wave
arXiv:1905.04334 · doi:10.1103/PhysRevB.100.125103
Abstract
Although a rigorous theoretical ground on metasurfaces has been established in the recent years on the basis of the equivalence principle, the majority of metasurfaces for converting a propagating wave into a surface wave are developed in accordance with the so-called generalized Snell's law being a simple heuristic rule for performing wave transformations. Recently, for the first time, Tcvetkova et al. [Phys. Rev. B 97, 115447 (2018)] have rigorously studied this problem by means of a reflecting anisotropic metasurface, which is, unfortunately, difficult to realize, and no experimental results are available. In this paper, we propose an alternative practical design of a metasurface-based converter by separating the incident plane wave and the surface wave in different half-spaces. It allows one to preserve the polarization of the incident wave and substitute the anisotropic metasurface by an omega-bianisotropic one. The problem is approached from two sides: By directly solving the corresponding boundary problem and by considering the ``time-reversed'' scenario when a surface wave is converted into a nonuniform plane wave. We develop a practical three-layer metasurface based on a conventional printed circuit board technology to mimic the omega-bianisotropic response. The metasurface incorporates metallic walls to avoid coupling between adjacent unit cells and accelerate the design procedure. The design is validated with full-wave three-dimensional numerical simulations and demonstrates high conversion efficiency.
arXiv comment10 pages, 6 figures, 1 table
References in corpus (18)
- A review of metasurfaces: physics and applications
- Asymmetric transmission of linearly polarized light at optical metamaterials
- Perfect control of reflection and refraction using spatially dispersive metasurfaces
- Meta-Gratings: Beyond the Limits of Graded Metasurfaces for Wavefront Control
- Twisted split-ring-resonator photonic metamaterial with huge optical activity
- Synthesis of passive lossless metasurfaces using auxiliary fields for reflectionless beam splitting and perfect reflection
- Arbitrary power-conserving field transformations with passive lossless omega-type bianisotropic metasurfaces
- Bianisotropic metasurfaces for scattering-free manipulation of acoustic wavefronts
- Acoustic metasurfaces for scattering-free anomalous reflection and refraction
- Unveiling the properties of metagratings via a detailed analytical model for synthesis and analysis
- Passive Lossless Huygens Metasurfaces for Conversion of Arbitrary Source Field to Directive Radiation
- Constructing the Near field and Far field with Reactive Metagratings: Study on the Degrees of Freedom
- A Leaky-Wave Antenna With Controlled Radiation Using a Bianisotropic Huygens' Metasurface
- Designing Metagratings Via Local Periodic Approximation: From Microwaves to Infrared
- Near-Perfect Conversion of a Propagating Plane Wave into a Surface Wave Using Metasurfaces
- Arbitrary beam control using passive lossless metasurfaces enabled by orthogonally-polarized custom surface waves
- Waveguide metacouplers for in-plane polarimetry
- Exact solution for surface wave to space wave conversion by periodical impenetrable metasurfaces
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