Mie Resonances Enabled Subtractive Structural Colors with Low-Index-Contrast Silicon Metasurfaces
Mie Resonances Enabled Subtractive Structural Colors with Low-Index-Contrast Silicon Metasurfaces
复制标题
米氏共振通过低折射率对比度硅超表面实现减色结构颜色
DOI：
10.1021/acsami.2c15333
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发表时间：
2022
期刊：
影响因子：
--
通讯作者：
Lina Shi
中科院分区：
文献类型：
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作者：
Xiao Shang;Jiebin Niu;Chong Wang;Longjie Li;Cheng Lu;Yongliang Zhang;Lina Shi
全电介质结构色在显示器件、成像安全认证、光学数据存储等方面具有广泛的应用前景，但如何在硅衬底上直接实现低深宽比的硅纳米结构的结构色仍是一个巨大的挑战，是未来集成光电子器件的发展方向.主要障碍来自于在低折射率对比度衬底上通过Si纳米结构实现强Mie共振的困难。在这里，我们展示了一个通用的原则，通过使用硅纳米柱直接在硅衬底上创建生动的亮场结构色。由于米氏共振的增强吸收，实现了整个可见光谱的互补色。结果表明，随着纳米柱高度的增加，颜色饱和度增加。值得注意的是，由于在长波长或所有可见波长处的吸收，梯形纳米柱阵列产生蓝色和黑色。我们的策略提供了一个强大的计划，加速集成光电应用在纳米彩色印刷，成像和显示。
All-dielectric structural colors are attracting increasing attention due to their great potential for various applications in display devices, imaging security certification, optical data storage, and so on. However, it remains a great challenge to achieve vivid structural colors with low-aspect-ratio silicon nanostructures directly on a silicon substrate, which is highly desirable for future integrated optoelectronic devices. The main obstacle comes from the difficulty in achieving strong Mie resonances by Si nanostructures on low-index-contrast substrates. Here, we demonstrate a generic principle to create vivid bright field structural colors by using silicon nanopillars directly on top of the silicon substrate. Complementary colors across the full visible spectrum are achieved as a result of the enhanced absorption due to Mie resonances. It is shown that the color saturation increases with the increasing of the nanopillar height. Remarkably, blue and black colors are generated by trapezoid nanopillar arrays as a result of the absorption at long wavelengths or all visible wavelengths. Our strategy provides a powerful scheme for accelerating the integrated optoelectronic applications in nanoscale color printing, imaging, and displays.