Half-wave plate based on a birefringent metamaterial in the visible range

OPTICS COMMUNICATIONS

卷:487

Article

Zeghdoudi, Thinhinane^1,2  Kebci, Zahia¹  Mezeghrane, Abdelaziz¹  Belkhir, Abderrahmane¹  Baida, Fadi Issam² 

[1] Univ Mouloud Mammeri, Lab Phys & Chim Quant, Tizi Ouzou, Algeria

[2] Univ Bourgogne Franche Comte, CNRS, Inst FEMTO ST, UMR 6174,Dept Opt PM Duffieux, F-25030 Besancon, France

关键词: Half-wave plate;    Metasurface;    Enhanced transmission;    FDTD;    Artificial anisotropy;   

DOI  :  10.1016/j.optcom.2021.126804

来源: Elsevier

【 摘 要 】

In this paper, a half-wave plate (HWP) based on a birefringent metamaterial is numerically designed to operate in the visible range. The proposed structure consists of an array of double-pattern perpendicular rectangular apertures (RAA) engraved into opaque silver film deposited on a glass substrate. One of the apertures is glass filled. The operating principle is based on the excitation and the propagation of one guided mode inside each aperture but with different effective indices. After transmission, a phase difference is obtained between the two transverse components, which value depends mainly on the metal thickness. We have investigated the simplest configuration using a homemade code based on the finite difference time domain method to design a half-wave plate with optimized efficiency resulting in transmission coefficient of more than 60% together with a birefringence of 2.1 at an operation wavelength of 737 nm. This kind of anisotropic metasurfaces promises a wide range of applications in integrated photonics.

【 授权许可】

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