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3D cross-bended metasurfaces with polarization insensitivity and high-Q resonances
Journal of Optics ( IF 2.1 ) Pub Date : 2020-09-09 , DOI: 10.1088/2040-8986/abad51
Ruhao Pan 1 , Shuo Du 1, 2 , Zhe Liu 3 , Wei Zhu 1 , Ce Li 1, 2 , Changzhi Gu 1, 2 , Junjie Li 1, 2, 4
Affiliation  

Metasurfaces with high-quality (HQ) resonances are always desired for their potential applications in biomedicine and photonic devices. However, the realization of HQ near-infrared metasurfaces with polarization insensitivity has faced problems with metallic loss, large feature size and limited configurations. In order to build up HQ metasurfaces working at the near-infrared range, we propose a 3D bended metasurface configuration consisting of a metallic supported frame and cross vertical split ring resonators, which are fabricated by a focused ion beam defined origami method. The relationship between Q factor/modulation depth of the resonances and the geometric morphology of the meta-atoms are established, and its polarization insensitivity is verified. Two HQ resonances with 22%/26% modulation depth and the quality factor of 24/30 at 1.75/2.5 μ m are experimentally obtained in the optimized metasurface. In addition, a polarization insensitive Fano resonance with large mo...

中文翻译:

具有极化不灵敏性和高Q共振的3D交叉弯曲超颖表面

高质量(HQ)共振的超颖表面在生物医学和光子设备中的潜在应用一直是人们所希望的。然而,具有极化不敏感性的HQ近红外超表面的实现面临金属损耗,特征尺寸大和配置受限的问题。为了建立在近红外范围内工作的HQ超表面,我们提出了一种3D弯曲超表面结构,该结构由金属支撑框架和垂直垂直裂环谐振器组成,它们是通过聚焦离子束定义的折纸方法制造的。建立了共振的Q因子/调制深度与亚原子的几何形态之间的关系,并验证了其极化不敏感性。两个HQ共振,调制深度为22%/ 26%,品质因数为1.75 / 2,为24/30。在优化的超表面上实验获得5μm。此外,极化不敏感的Fano共振具有较大的...
更新日期:2020-09-10
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