Yang Zhengmei, Li Wenfeng, Duan Huigao
Opt Lett. 2024 Feb 1;49(3):594-597. doi: 10.1364/OL.511129.
High-purity structural colors with low fabrication cost are in demand for their commercial applications. Here, we demonstrate an all-dielectric Fabry-Pérot cavity structure consisting of four-layer lossy and lossless dielectric films alternately stacked for producing high-purity and angle-invariant reflective colors. Multiple cavity resonances function together to significantly suppress the undesired reflection with the enhanced optical absorption, leading to a distinct and saturated color with a high efficiency of ∼70%. Besides, due to the high refractive indices of constituent materials, the color appearance of the designed structure can be maintained well at ±50° incident angle for two polarization states. The excellent color performance of the proposed device together with cost-effective manufacturing convenience opens up new avenues for their large-area applications in various areas.
具有低制造成本的高纯度结构色因其商业应用而备受需求。在此，我们展示了一种全介质法布里 - 珀罗腔结构，它由四层有损耗和无损耗的介质膜交替堆叠而成，用于产生高纯度和角度不变的反射色。多个腔共振共同作用，通过增强光吸收显著抑制不需要的反射，从而产生具有约70%的高效率的鲜明且饱和的颜色。此外，由于组成材料的高折射率，所设计结构的颜色外观在两种偏振态下以±50°入射角时都能得到很好的保持。所提出器件的优异颜色性能以及具有成本效益的制造便利性为其在各个领域的大面积应用开辟了新途径。
