2025-02-27 中国科学院 (CAS)
Optical properties of the chiral structural color microdomes and a concentric-arc pattern using these microdomes on a contact lens for identity authentication mimicking the personal identification system based on iris patterns. (Image by LI’s group)
<関連情報>
- https://english.cas.cn/newsroom/research_news/chem/202502/t20250226_902632.shtml
- https://www.pnas.org/doi/10.1073/pnas.2419113122
マイクロドームからのキラル構造色 Chiral structural color from microdomes
Xintao Lai, Tongyu Li, Xiaoyu Hou, +4, and Mingzhu Li
Proceedings of the National Academy of Sciences Published:February 25, 2025
DOI:https://doi.org/10.1073/pnas.2419113122
Significance
Chiral-structural-color materials with high-dimensional controllable channels, such as wavelength, amplitude, polarization, and phase, are the excellent candidates for high-capacity information storage and encryption. Currently, most of the artificial chiral-structural-color materials are restricted to specific compositions and sophisticated nanostructures. Meanwhile, they usually exhibit single-handedness, limiting their capacity to control multiple polarization states of light. In this study, we found the tunability and multiple polarization-modulated chirality of the structural colors generated by microdomes made from common polymers, which provides a promising roadmap for high-capacity information encryption and high-security anti-counterfeiting.
Abstract
Artificial chiral-structural-color materials can carry high-dimensional information based on multiple optical degrees of freedom, providing possibilities for advanced optical security and information storage. However, current artificial chiral-structural-color materials are hindered by their specific compositions, fine nanostructures, and single polarization modulation. Here, we found that microdomes made from common polymers have chiral structural colors with broadband tunability and multiple polarization-modulated chirality. The microdome patterns are easily fabricated by ordinary printing techniques and have inhomogeneous spatial distributions of full polarization states and customizable colors. Our chiral-structural-color microdomes (CSCMs) provide a promising roadmap for high-capacity information encryption and high-security anti-counterfeiting. We developed multidimensional tunable structural color displays and achieved encryption with high information capacity. To further highlight the application potential, we constructed contact lenses integrated with CSCMs for identity authentication with 232 distinctive cryptograms.
