The technological requirements of low-power and high-fidelity color displays have been instrumental in driving research into advanced coloration technologies. At the forefront of these developments is the implementation of dye-free approaches, which overcome previous constraints related to color resolution and fading. Resonant dielectric nanostructures have emerged as a promising paradigm, showing great potential for high efficiency, high color saturation, wide gamut palette, and image reproduction. However, they still face limitations related to color accuracy, purity, and simultaneous brightness tunability. Here, we demonstrate an all-dielectric metasurface empowered by photonic bound states in the continuum (BICs), which supports sharp resonances throughout the visible spectral range, ideally suited for producing a wide range of structural colors. The metasurface design consists of TiO2 ellipses with carefully controlled sizes and geometrical asymmetry, allowing versatile and on-demand variation of the brightness and hue of the output colors, respectively.

中文翻译：

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由连续体中的束缚态提供支持的全介电结构着色


低功耗和高保真彩色显示器的技术要求有助于推动对高级着色技术的研究。这些发展的最前沿是无染料方法的实施，它克服了以前与颜色分辨率和褪色相关的限制。谐振介电纳米结构已成为一种很有前途的范式，在高效率、高色彩饱和度、宽色域调色板和图像再现方面显示出巨大的潜力。但是，它们仍然面临与颜色准确性、纯度和同步亮度可调性相关的限制。在这里，我们展示了一种由连续体中的光子束缚态 （BIC） 提供支持的全介电超表面，它支持整个可见光谱范围内的尖锐共振，非常适合产生各种结构颜色。超表面设计由精心控制尺寸和几何不对称性的 TiO2 椭圆组成，允许分别对输出颜色的亮度和色调进行多功能和按需变化。