Spectral Modulation through the Hybridization of Mie-Scatterers and Quasi-Guided Mode Resonances: Realizing Full and Gradients of Structural Color
Spectral Modulation through the Hybridization of Mie-Scatterers and Quasi-Guided Mode Resonances: Realizing Full and Gradients of Structural Color
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DOI：
10.1021/acsnano.0c05656
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发表时间：
2020-11-24
期刊：
影响因子：
17.1
通讯作者：
Rho, Junsuk
中科院分区：
文献类型：
--
作者：
Jang, Jaehyuck;Badloe, Trevon;Rho, Junsuk
由米氏散射体的亚波长阵列组成的超表面可以被设计来控制入射光的光学特性。基本米氏共振与晶格共振的混合极大地增强了单个米氏散射体的散射截面。通过使用两种不同设计的氢化非晶硅纳米棒仔细设计这些混合模式的位置，我们通过数值计算和实验制造了两个全彩印刷的例子；一种具有与 Adobe RGB 色域相当的光谱颜色，另一种具有颜色渐变。我们识别并描述了每种机制背后的机制，并提供了一个框架，可用于设计用于光谱调制的亚波长米氏散射体的任何全电介质超表面。
Metasurfaces made up of subwavelength arrays of Mie scatterers can be engineered to control the optical properties of incident light. The hybridization of the fundamental Mie resonances with lattice resonances greatly enhances the scattering cross-section of individual Mie scatterers. Through careful design of the locations of these hybridized modes using two differently engineered hydrogenated amorphous silicon nanorods, we numerically calculate and experimentally fabricate two examples of full color printing; one with spectral colors comparable to the Adobe RGB gamut, and another with gradients of color. We identify and characterize the mechanisms behind each and provide a framework that can be used to design any all-dielectric metasurfaces of subwavelength Mie scatterers for spectral modulation.