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Researchers developed novel hidden security tags using femtosecond laser patterning of silicon-erbium-silicon films. These advanced anticounterfeiting labels offer secure product authentication with infrared luminescent readout.

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Area of Science:

  • Materials Science
  • Optoelectronics
  • Nanotechnology

Background:

  • Product counterfeiting necessitates advanced anticounterfeiting measures.
  • Demand exists for scalable, high-security label fabrication methods.

Purpose of the Study:

  • To develop a simple strategy for fabricating hidden security tags.
  • To utilize femtosecond laser patterning for creating unique IR luminescent properties.

Main Methods:

  • Direct femtosecond laser patterning of silicon-erbium-silicon thin films.
  • Controlled laser-driven oxidation to tune optical properties.
  • Creation of self-organized surface nanotextures for security features.

Main Results:

  • Fabrication of hidden security tags with tunable IR luminescence.
  • Different emission intensities from optically similar patterned areas.
  • Readout achieved at C-band telecommunication wavelengths.

Conclusions:

  • Femtosecond laser patterning offers a scalable method for anticounterfeiting labels.
  • Erbium-doped materials enable covert security features with IR readout.
  • This technology advances the application of IR-luminescent labels for forensic security.