Upconversion/Downshifting Multimode Luminescence of Lanthanide-doped Nanocrystals for Multidimensional Information...

Area of Science:

• Materials Science
• Optics and Photonics
• Information Security

Background:

• Optical information encoding faces challenges with low capacity and security.
• Existing luminescent materials and techniques have limitations for robust data security.

Purpose of the Study:

• To develop novel nanocrystals for high-capacity and high-security optical information encoding.
• To explore multi-stimuli-responsive and multimode emission properties for advanced applications.

Main Methods:

• Synthesis of core-shell-shell (CSS) lanthanide-doped nanocrystals.
• Utilizing co-excitation with 1532, 980, and 254 nm lasers.
• Leveraging self-excited Er³⁺ and Ce³⁺ -sensitized mechanisms for Stokes and anti-Stokes processes.

Main Results:

• Achieved simultaneous Stokes and anti-Stokes emissions within the same CSS nanocrystals.
• Demonstrated multi-stimuli responsiveness and multimode emission.
• Successfully applied CSS nanocrystals in multidimensional information encoding, showing high capacity and security.

Conclusions:

• CSS lanthanide-doped nanocrystals offer a powerful platform for advanced optical information encoding.
• The developed materials significantly enhance information encoding capacity and security.
• This research provides a new direction for designing secure optical data storage solutions.