College of Materials Science and Engineering, Zhejiang University of Technology, Hangzhou 310014, China.
Interdisciplinary Center for Quantum Information, State Key Laboratory of Modern Optical Instrumentation, College of Optical Science and Engineering, College of Optical Science and Engineering, Zhejiang University, Hangzhou 310027, China.
Nanoscale Horiz. 2022 Jul 25;7(8):890-898. doi: 10.1039/d2nh00232a.
Different from the traditional concept that binary photonic crystals can only reproduce mixed colors due to the simple superposition of the photonic band gaps, precisely addressable "true colors" obtained from volume fraction deviation of binary photonic crystals with metastable structures are reported here. Inspired by the mussels' adhesion and longhorn beetles' photonic scales, a binary metastable amorphous photonic crystal was obtained by enhancing the driving forces and customizing the surface roughness of building blocks to regulate the thermodynamic and dynamic factors simultaneously. By controlling the volume fraction of two building blocks, the tunable photonic bandgap varies linearly in the visible region. Furthermore, the "true violet" that cannot be obtained by conventional color mixing is reproduced with the particular ultraviolet characteristics of red photonic pigment's metastable structures, which complement the palette effect of "true colors". Meanwhile, due to the self-adhesion and post-modification of building blocks, the stability of photonic pigments is further improved. The binary photonic pigments not only solve the dilemma of mixed colors, but also realize the tunability and multiplicity of "true colors", offering a new choice for the color palette of the world.
与传统观念认为二元光子晶体由于光子带隙的简单叠加只能再现混合颜色不同，本文报道了具有亚稳结构的二元光子晶体通过体积分数偏离可以精确获得可寻址的“真实颜色”。受贻贝粘附和天牛光鳞的启发，通过增强驱动力和定制构建块的表面粗糙度来同时调节热力学和动力学因素，获得了二元亚稳非晶光子晶体。通过控制两个构建块的体积分数，在可见光区可调谐的光子带隙呈线性变化。此外，通过利用红色光子颜料亚稳结构的特殊紫外特性再现了传统颜色混合无法获得的“真紫色”，补充了“真实颜色”的调色效果。同时，由于构建块的自粘附和后修饰，进一步提高了光子颜料的稳定性。二元光子颜料不仅解决了混合颜色的困境，还实现了“真实颜色”的可调和多样性，为世界的调色板提供了新的选择。
