Reflection structural colors based on Fano resonance in planar optical nanocavities with Sb2Te3 layer

IF 4.2 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Optical Materials Pub Date : 2025-08-28 DOI:10.1016/j.optmat.2025.117452

Chunyu Wang, Hua Lu, Jiadeng Zheng, Dikun Li, Yiqiao Zhang, Jianxu Zhao, Jianlin Zhao

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引用次数: 0

Abstract

Planar optical nanocavities play crucial roles in light interactions with matters and structural colors. The purity of reflection structural color is generally limited by the resonant absorption of light, especially in metal-based nanocavities. Herein, we propose and fabricate a novel kind of planar metal-based nanocavities integrated with an ultrathin antimony telluride (Sb₂Te₃) layer to generate Fano resonance effect for achieving the vivid reflection colors, which present the higher purity than those of traditional metal/dielectric/metal cavities. The results show that the Sb₂Te₃/ITO/Ag nanofilm possesses strong light absorption in the entire visible region. The integration of this nanofilm with the ITO and Ag layers can give rise to the generation of Fano resonance effect with the low light absorption and narrow reflection peak. The experiments agree excellently with the simulations. The Fano resonance effect can be derived from the coupling interference between the wide-spectrum lossy resonance (continuum state) in Sb₂Te₃/ITO/Ag nanofilm and narrow-spectrum resonance (discrete state) in Ag/ITO/Ag nanocavity. We achieve the high-purity reflection structural colors in the planar nanocavities and vivid color printing based on the Fano resonance effect by using grayscale focused ion beam (FIB) lithography. This work will pave a new avenue for the realization of Fano resonance and its application in high-performance reflection color printing.

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基于Fano共振的Sb2Te3层平面光学纳米腔反射结构色

平面光学纳米空腔在光与物质和结构色的相互作用中起着至关重要的作用。反射结构色的纯度通常受到光的共振吸收的限制，特别是在金属基纳米腔中。在此，我们提出并制作了一种新型的平面金属基纳米腔与超薄碲化锑（Sb2Te3）层集成，以产生Fano共振效应，从而实现鲜明的反射颜色，具有比传统金属/介电/金属腔更高的纯度。结果表明，Sb2Te3/ITO/Ag纳米膜在整个可见光区都具有较强的光吸收。该纳米膜与ITO和Ag层的集成可以产生Fano共振效应，具有低光吸收和窄反射峰。实验结果与模拟结果吻合良好。Fano共振效应是由Sb2Te3/ITO/Ag纳米膜中的广谱损耗共振（连续态）与Ag/ITO/Ag纳米腔中的窄谱共振（离散态）耦合干扰产生的。利用灰度聚焦离子束（FIB）光刻技术，在平面纳米空腔中实现了高纯度的反射结构色和基于法诺共振效应的彩色印刷。本工作将为范诺共振的实现及其在高性能反射彩色印刷中的应用开辟新的途径。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Optical Materials 工程技术-材料科学：综合

CiteScore

6.60

自引率

12.80%

发文量

1265

审稿时长

38 days

期刊介绍： Optical Materials has an open access mirror journal Optical Materials: X, sharing the same aims and scope, editorial team, submission system and rigorous peer review. The purpose of Optical Materials is to provide a means of communication and technology transfer between researchers who are interested in materials for potential device applications. The journal publishes original papers and review articles on the design, synthesis, characterisation and applications of optical materials. OPTICAL MATERIALS focuses on: • Optical Properties of Material Systems; • The Materials Aspects of Optical Phenomena; • The Materials Aspects of Devices and Applications. Authors can submit separate research elements describing their data to Data in Brief and methods to Methods X.