Reversible optical data storage and encryption enabled by phase-change and hydrogel integration

Area of Science:

• Materials Science
• Optoelectronics
• Nanotechnology

Background:

• Phase-change materials and hydrogels are crucial for advanced optical information storage and encryption.
• Current technologies require versatile, low-cost, high-speed materials for next-generation applications.

Purpose of the Study:

• To develop a hybrid platform for multi-level optical data storage and full-color image multiplexing.
• To integrate laser-written antimony trisulfide (Sb₂S₃) with a humidity-responsive hydrogel for enhanced functionalities.

Main Methods:

• Direct laser writing of Sb₂S₃ on a humidity-responsive azido-grafted carboxymethyl cellulose (CMC-N₃) hydrogel.
• Utilizing laser-induced amorphous-crystalline transitions in Sb₂S₃ for non-volatile data storage.
• Employing UV-programmable cavity modulation and humidity-dependent responses for tunable full-color imaging.

Main Results:

• Fabrication of a transmissive multiplexed optical storage device with full-color image capabilities.
• Demonstration of independent encoding and retrieval of multi-level information through dynamic and reversible processes.
• Achieved humidity-dependent tunable full-color image response and non-volatile, rewritable optical data.

Conclusions:

• The hybrid platform offers a new paradigm for multifunctional optical devices.
• Potential applications include secure data storage, anti-counterfeiting displays, and environmental sensing.
• Synergistic integration of Sb₂S₃ and hydrogel enables advanced optical information processing.