Ultra-high-Q dielectric metasurface for polarization conversion

J. F. Algorri; D. Zografopoulos; A. Ferraro; B. Garcia-Camara; R. Vergaz; R. Beccherelli; J. M. Sanchez-Pena

doi:10.1117/12.2527908

5 September 2019 Ultra-high-Q dielectric metasurface for polarization conversion

J. F. Algorri, D. Zografopoulos, A. Ferraro, B. Garcia-Camara, R. Vergaz, R. Beccherelli, J. M. Sanchez-Pena

Proceedings Volume 11080, Metamaterials, Metadevices, and Metasystems 2019; 110802O (2019) https://doi.org/10.1117/12.2527908
Event: SPIE Nanoscience + Engineering, 2019, San Diego, California, United States

Abstract

In this work, a novel method to obtain all-dielectric toroidal response metasurfaces in the W-band and THz range is demonstrated. Two designs are proposed, a symmetric and asymmetric disk metasurface. The first design is intended to corroborate the theoretical analysis, demonstrating the excitation of a strong toroidal mode resonance at 93.2 GHz. Then, the second design is used to demonstrate that symmetry-breaking variations in the disk dimensions, could lead to birefringent metasurfaces, affecting the polarization of the impinging light. Two structures are designed, a polarization beam splitter and a polarization converter. Such devices are difficult to obtain at the target frequency range with low absorption, so they could be of particular interest for the next generation of 5G communications and THz devices.

Citation Download Citation

J. F. Algorri, D. Zografopoulos, A. Ferraro, B. Garcia-Camara, R. Vergaz, R. Beccherelli, and J. M. Sanchez-Pena "Ultra-high-Q dielectric metasurface for polarization conversion", Proc. SPIE 11080, Metamaterials, Metadevices, and Metasystems 2019, 110802O (5 September 2019); https://doi.org/10.1117/12.2527908

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KEYWORDS

Dielectric polarization

Beam splitters

Dielectrics

Polarization

Phase shifts

Scattering

Silicon

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