Structural Color from Multi-Bounce Reflection Interference in Metalized Microstructures

ACS Applied Optical Materials Pub Date : 2024-11-12 DOI:10.1021/acsaom.4c0039210.1021/acsaom.4c00392

Malak S. Rayes, Nathaniel E. Sturniolo, Krista Hirsch, Caleb H. Meredith and Lauren D. Zarzar*,

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Abstract

The development of materials and methods for controlling iridescent structural color arising from optical interference has attracted considerable attention for a variety of applications ranging from anticounterfeiting to displays. Here, we investigate high-reflectivity structural color generated by multi-bounce reflection interference within metallized microstructures and describe the relationships between coloration, reflection efficiency, and microstructure geometry. Ray tracing simulations are combined with experimental, angularly resolved far-field optical analysis for a detailed understanding of the underlying mechanism. Fabrication of microstructures with grayscale lithography and image patterning using metal masking is demonstrated. We further investigate microstructure geometries combining both concave and convex curvatures for highly diversified and more complex tunable optical interference. These results provide insight into how to control the iridescent properties of microstructures with improved structural color saturation and reflectivity by exploiting a multi-bounce interference optical mechanism.

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金属化微结构中的多弹反射干涉产生的结构色彩

从防伪到显示等各种应用领域，控制由光学干涉产生的虹彩结构色的材料和方法的开发已引起了广泛关注。在此，我们研究了金属化微结构中的多弹反射干涉产生的高反射率结构色，并描述了着色、反射效率和微结构几何形状之间的关系。我们将光线跟踪模拟与实验性角分辨远场光学分析相结合，以详细了解其基本机制。演示了利用灰度光刻技术和金属掩膜图像图案化技术制造微结构。我们还进一步研究了结合凹凸曲率的微结构几何形状，以实现高度多样化和更复杂的可调光学干涉。这些结果为我们深入了解如何利用多弹干涉光学机制来控制微结构的虹彩特性，从而提高结构色彩饱和度和反射率提供了启示。

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来源期刊

ACS Applied Optical Materials 材料科学-光学材料-

CiteScore

1.10

自引率

0.00%

发文量

期刊介绍： ACS Applied Optical Materials is an international and interdisciplinary forum to publish original experimental and theoretical including simulation and modeling research in optical materials complementing the ACS Applied Materials portfolio. With a focus on innovative applications ACS Applied Optical Materials also complements and expands the scope of existing ACS publications that focus on fundamental aspects of the interaction between light and matter in materials science including ACS Photonics Macromolecules Journal of Physical Chemistry C ACS Nano and Nano Letters.The scope of ACS Applied Optical Materials includes high quality research of an applied nature that integrates knowledge in materials science chemistry physics optical science and engineering.