基于亚波长正弦光栅的方位控制多色偏移

IF 6.6 2区 物理与天体物理 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY
Tuo Yang, Yihang Zhou, Hongguang Li, Zefeng Rong, Yanyan Huang, Ping Xu, Haixuan Huang, Xia Yuan, Xulin Zhang, Lei Lei, Guijun Li, Yuanyang Wu, Yutong Di, Shuai Geng, Yunpeng Cui, Mengyu Wang, Yuchao Ma, Wenjie Kuang
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引用次数: 0

摘要

基于亚波长光栅的变色器件在特定的谐振条件下表现出动态可调的光谱响应,在光学防伪和表面装饰方面提供了先进的应用。然而,传统器件仍然受到结构复杂、调谐范围窄、能效低和制造成本高等限制。因此,我们提出了一种设计方法,可以通过方位角旋转(即设备的平面内旋转)实现动态色彩移动的多色移动设备。所提出的评价函数可以调整,以产生所需的光谱响应,使不同的颜色从单一的模板移位。采用严格耦合波分析(RCWA)和免疫算法优化矩形光栅的几何参数和方位角,然后将其转换为正弦结构,以简化大面积制造,同时保持性能。利用这种方法,设计了基于亚波长正弦光栅的四色和五色移位装置,实现了所有目标颜色的峰值反射率超过45%,最大反射率达到89%。此外,采用低成本曝光全息干涉法制作了四色移位装置,验证了该方法的有效性。与传统的亚波长光栅滤光片相比,该结果简化了结构,同时提高了光学性能和制造可行性,为经济高效的动态光学器件提供了新的途径。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Azimuth-controlled multicolor shifting based on subwavelength sinusoidal grating
Subwavelength grating-based color-shifting devices exhibit dynamically tunable spectral responses under specific resonant conditions, offering advanced applications in optical anticounterfeiting and surface decoration. However, conventional devices remain limited by structural complexity, narrow tuning ranges, low energy efficiency, and high manufacturing costs. Thereby, we propose a design methodology for multicolor shifting devices capable of dynamic color shifts through azimuthal angle rotation (i.e., in-plane rotation of the device). The proposed evaluation function can be adjusted to yield the desired spectral response, enabling diverse color shifts from a single template. Optimization of the geometric parameters and azimuth angles of rectangular gratings using rigorous coupled-wave analysis (RCWA) and an immune algorithm, followed by conversion into a sinusoidal structure to simplify large-area fabrication while maintaining performance. Using this approach, quad- and penta-color shifting devices based on subwavelength sinusoidal gratings were designed, achieving peak reflectance exceeding 45 % for all target colors, with maxima reaching 89 %. Additionally, the quad-color shifting device was fabricated using low-cost exposed holographic interferometry, validating the method. The results simplify the structure compared to conventional subwavelength grating filters, while enhancing optical performance and fabrication feasibility, offering a new approach for cost-effective, high-performance dynamic optical devices.
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来源期刊
Nanophotonics
Nanophotonics NANOSCIENCE & NANOTECHNOLOGY-MATERIALS SCIENCE, MULTIDISCIPLINARY
CiteScore
13.50
自引率
6.70%
发文量
358
审稿时长
7 weeks
期刊介绍: Nanophotonics, published in collaboration with Sciencewise, is a prestigious journal that showcases recent international research results, notable advancements in the field, and innovative applications. It is regarded as one of the leading publications in the realm of nanophotonics and encompasses a range of article types including research articles, selectively invited reviews, letters, and perspectives. The journal specifically delves into the study of photon interaction with nano-structures, such as carbon nano-tubes, nano metal particles, nano crystals, semiconductor nano dots, photonic crystals, tissue, and DNA. It offers comprehensive coverage of the most up-to-date discoveries, making it an essential resource for physicists, engineers, and material scientists.
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