Hybrid Encoding Strategy of Nanostructures for High‐Performance Security Information Encryption

Abstract

AbstractPrograming nanostructure of soft photonic crystal materials to try to diversify has great potential for application in the field of information security, lasing, and display. However, complex programming nanostructures for regulating and controlling their structural color and stimuli‐response behavior remain a technical challenge. Here, a strategy is demonstrated for hybrid encoding nanostructures of soft photonic crystals using cholesteric liquid crystal films (CLCFs). The public and secure information can be easily edited through the independent tuning of Bragg center‐wavelength and thermal sensitivity of the CLCF through the alternating current electric field and Michael addition reaction. A photomask is used when ultraviolet irradiates to record the edited information on one CLCF. The encrypted information can be protected by a triple mechanism of spectral analysis, algorithm encryption, and temperature response encryption, which all can be defined as needed. High encrypted composite coding security and visual patterns are fabricated using this coordination strategy. This hybrid encoding provides a platform for a complex program of nanostructure of the photonic crystals and shows great potential in secure information writing and encryption enhancement.