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RGB Tricolor and Multimodal Dynamic Optical Information Encryption and Decoding for Anti-Counterfeiting Applications
Hao Song1, Ran Zhang2, Zihan Zhao1
1Research Institute of Photonics, Dalian Polytechnic University, Dalian 116034, China.
ACS Applied Materials & Interfaces
|September 20, 2022
Summary
This study introduces a new multimodal optical anti-counterfeiting method using red, green, and blue (RGB) emissions. This dynamic strategy enhances information security by combining photoluminescence, persistent luminescence, and thermally stimulated luminescence techniques.
Area of Science:
- Materials Science
- Optics
- Information Security
Background:
- Conventional optical anti-counterfeiting methods using single-color emission are easily deciphered, limiting their use in information security.
- Developing advanced anti-counterfeiting technologies is crucial for securing sensitive information and products.
Purpose of the Study:
- To develop a multimodal dynamic optical information coding strategy with red, green, and blue (RGB) tricolors for enhanced anti-counterfeiting applications.
- To integrate photoluminescence (PL), persistent luminescence (PersL), thermally stimulated luminescence (TSL), and thermally stimulated persistent luminescence (TSPL) for dynamic information encryption and decoding.
Main Methods:
- Utilized BaSi2O2N2:Eu2+ phosphors for blue emission, exhibiting distinct responses to light, heat, and force stimuli.
- Combined red Sr2Si5N8:Eu2+,Dy3+ and green SrSi2O2N2:Eu2+,Dy3+ nitride phosphors to achieve RGB tricolor emission.
- Integrated a quick response (QR) code mechanism with RGB tricolor patterns for multi-information encryption and recognition across different luminescence modes.
Main Results:
- Successfully developed a RGB tricolor and multimodal strategy for anti-counterfeiting, demonstrated with an "RGB tricolor flower" example.
- Achieved dynamic display of optical information encryption and decoding through various PL, PersL, TSL, and TSPL modes.
- Demonstrated effective recognition of laminated RGB QR code patterns with specific information (e.g., "DLPU", "116034") in different luminescence modes.
Conclusions:
- The developed RGB tricolor and multimodal optical information encryption/decoding strategy significantly enhances the security level of advanced optical information technologies.
- This approach offers potential applications in dynamic anti-counterfeiting fields, improving security against sophisticated counterfeiting methods.
- The integration of multiple luminescence phenomena and QR codes provides a robust platform for secure information encoding and authentication.
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