Dynamic Structural Color Display Based on Femtosecond Laser Variable Polarization Processing. Issue 16 (26th July 2021)

• Record Type: Journal Article
• Authors: Wu, Peichao; Cao, Xiaowen; Zhao, Ling; Chen, Zhihao; Zhang, Mina; Juodkazis, Saulius; Zhang, Wenwu
• Is Part Of: Advanced materials interfaces. Volume 8:Issue 16(2021)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2021-07-26
• Subjects: dynamic displays -- femtosecond laser -- information storage -- structural colors -- variable polarization processing; Materials science -- Periodicals; 620.11
• DOI: 10.1002/admi.202100460
• Languages: English
• ISSNs: 2196-7350

Abstract

Abstract: Vivid structural colors, inspired by butterflies, which can display iridescent colors dynamically when white light illuminates the surface with subwavelength period ripples, have attracted significant interest for its potential application in the fields of information storage, anti‐counterfeiting, etc. However, there is still a huge demand for the development of multipattern dynamically transformable display surfaces using a versatile method. A new scheme based on femtosecond laser combined with variable polarization processing has been proposed. This scheme enables a surface with a structural color function that can be easily prepared by adjusting the polarization of the laser via a half‐wave plate. Four types of structural units with designated periodic orientations are written on the same sample to exhibit four different colorful images. Through experiment and analysis, it is demonstrated that different colors can be displayed by changing the observation angle, and a multi‐pattern display can be realized by rotating the sample. The lithography‐free inscribed patterns show a strong azimuthal angular sensitivity to color and its brightness. This work demonstrates that femtosecond laser surface structuring provides a versatile platform to create various micro/nanostructures on a solid surface, and this technique can be used for the biomimetic lithography‐free processing of any material using ablation. Abstract : The complex patterns are imprinted using polarization control of the femtosecond laser pulses, which displays different information and colors while rotating the sample stage or changing the observation angle.