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
我的研究关注软功能材料中的介观结构调控及其光学、热学与力学功能。我们以胶体、颗粒组装和聚合物复合体系为主要材料平台，研究剪切、弯曲、拉伸和循环形变等外部力学场如何驱动微结构重排、结晶、晶格转变与取向选择，并进一步调控材料的结构色、光谱响应、热辐射特性和力学响应。通过将软物质物理、可规模化加工和结构—性能分析相结合，研究旨在发展可编程软光子材料与功能涂层，为自适应光学表面、光热调控、传感和机械编码材料提供新的设计思路.