Lee Kyu-Tae, Kang Daeshik, Park Hui Joon, Park Dong Hyuk, Han Seungyong
Department of Physics, Inha University, Incheon 22212, Korea.
Department of Mechanical Engineering, Ajou University, San 5, Woncheon-Dong, Yeongtong-Gu, Suwon 16499, Korea.
Materials (Basel). 2019 Mar 30;12(7):1050. doi: 10.3390/ma12071050.
We propose a design of angle-insensitive and polarization-independent reflective color filters with high efficiency (>80%) based on broad resonance in a Fabry⁻Pérot cavity where asymmetric metal-dielectric-metal planar structures are employed. Broadband absorption properties allow the resonance in the visible range to remain nearly constant over a broad range of incident angles of up to 40° for both s- and p-polarizations. Effects of the angles of incidence and polarization state of incident light on the purity of the resulting colors are examined on the CIE 1931 chromaticity diagram. In addition, higher-order resonances of the proposed color filters and their electric field distributions are investigated for improved color purity. Lastly, the spectral properties of the proposed structures with different metallic layers are studied. The simple strategy described in this work could be adopted in a variety of research areas, such as color decoration devices, microscopy, and colorimetric sensors.
我们提出了一种基于法布里-珀罗腔中宽共振的角度不敏感且偏振无关的高效（>80%）反射式滤色器设计，其中采用了不对称金属-电介质-金属平面结构。宽带吸收特性使得在高达40°的宽入射角范围内，对于s偏振和p偏振，可见光范围内的共振几乎保持恒定。在CIE 1931色度图上研究了入射角和入射光偏振态对所得颜色纯度的影响。此外，研究了所提出的滤色器的高阶共振及其电场分布，以提高颜色纯度。最后，研究了具有不同金属层的所提出结构的光谱特性。这项工作中描述的简单策略可应用于各种研究领域，如彩色装饰器件、显微镜和比色传感器。
