摘要
Materials with retro‐reflective optical properties are essential for various applications, yet solutions for achieving iridescent retro‐reflective colors remain limited. Here, a scalable method is reported to fabricate flexible infrared photonic crystal films that exhibit vivid retro‐reflecting colors over a wide range of angles. Monodisperse polystyrene spheres are shear‐assembled into highly ordered lattices and embedded in UV‐curable resin, forming volume diffraction gratings. The resulting films simultaneously display multidirectional structural colors in forward reflection, retro‐reflection, and retro‐transmission. Upon tilted incident light, retro‐reflective colors that appear against incident light are especially pronounced. The visibility, wavelength, and color shifts over angle of the resulting colors are tunable with the size of the spheres or applied strain, enabling dynamic, direction‐sensitive optical responses with minimal power consumption. This work presents a materials design strategy for multifunctional, scalable structural color systems and opens new possibilities for smart, sustainable safety applications and adaptive visual signaling.
邱军军
PhD
姜心雨
PhD
高峰
PhD
安童
PhD
赵其斌
副教授
研究兴趣包括胶体光子晶体组装、材料结构规则度调控、规则及不规则结构在不同条件下的演变过程及物理机理、光学材料及能源类材料制备、微纳结构材料的大面积制备方法、自然界中的功能结构及其在跨种演变视角下的生物进化学等。