Department of Chemistry, University of California, Riverside, California 92521, United States.
School of Physics and Optoelectronics, South China University of Technology, Guangzhou 510641, China.
Nano Lett. 2023 Mar 8;23(5):1981-1988. doi: 10.1021/acs.nanolett.3c00069. Epub 2023 Feb 27.
Integrating plasmonic resonance into photonic bandgap nanostructures promises additional control over their optical properties. Here, one-dimensional (1D) plasmonic photonic crystals with angular-dependent structural colors are fabricated by assembling magnetoplasmonic colloidal nanoparticles under an external magnetic field. Unlike conventional 1D photonic crystals, the assembled 1D periodic structures show angular-dependent colors based on the selective activation of optical diffraction and plasmonic scattering. They can be further fixed in an elastic polymer matrix to produce a photonic film with angular-dependent and mechanically tunable optical properties. The magnetic assembly enables precise control over the orientation of the 1D assemblies within the polymer matrix, producing photonic films with designed patterns displaying versatile colors from the dominant backward optical diffraction and forward plasmonic scattering. The combination of optical diffraction and plasmonic properties within a single system holds the potential for developing programmable optical functionalities for applications in various optical devices, color displays, and information encryption systems.
将等离子体共振集成到光子带隙纳米结构中有望进一步控制它们的光学性质。在这里，通过在外磁场下组装磁等离子体胶体纳米粒子，制备了具有角度相关结构颜色的一维（1D）等离子体光子晶体。与传统的一维光子晶体不同，组装的一维周期性结构基于光衍射和等离子体散射的选择性激活显示出角度相关的颜色。它们可以进一步固定在弹性聚合物基质中，以产生具有角度相关和机械可调光学性质的光子膜。磁组装能够精确控制聚合物基质中一维组装体的取向，产生具有设计图案的光子膜，显示出从主要的后向光学衍射和前向等离子体散射的各种颜色。单个系统内的光衍射和等离子体性能的结合为开发可编程光学功能以应用于各种光学器件、彩色显示器和信息加密系统提供了潜力。
