Related Experiment Video
Updated: Oct 16, 2025
08:07
Laser-induced Forward Transfer of Ag Nanopaste
Published on: March 31, 2016
11.5K
Anti-Counterfeiting White Light Printed Image Multiplexing by Fast Nanosecond Laser Processing.
Nicolas Dalloz1,2, Van Doan Le1, Mathieu Hebert1
1Laboratoire Hubert Curien UMR 5516, Univ Lyon, UJM-Saint-Etienne, CNRS, Institut d Optique Graduate School, 18 rue Professeur Benoît Lauras, Saint-Etienne, 42000, France.
Advanced Materials (Deerfield Beach, Fla.)
|October 14, 2021
Summary
Researchers developed advanced plasmonic metasurfaces for multi-image display. This technology enables low-cost, tamper-proof security features with high-resolution, customized images for commercial applications.
Area of Science:
- Optics and Photonics
- Materials Science
- Nanotechnology
Background:
- Passive plasmonic metasurfaces can achieve image multiplexing, displaying different images based on observation conditions.
- Previous work demonstrated three-image multiplexing using femtosecond-laser-processed random plasmonic metasurfaces under polarized white light.
Purpose of the Study:
- To extend image multiplexing capabilities of plasmonic metasurfaces to various observation modes for naked-eye viewing.
- To achieve four-image multiplexing under polarized light conditions.
- To develop a cost-effective, high-speed fabrication process for customized, tamper-proof security features.
Main Methods:
- Utilized a color-search algorithm to optimize image multiplexing for different observation modes.
- Employed femtosecond and nanosecond laser processing to create random plasmonic metasurfaces with self-organized nanoparticle patterns.
- Investigated light diffraction and dichroism arising from the hybridization of localized surface plasmon resonance and lattice resonance.
Main Results:
- Successfully implemented image multiplexing compatible with naked-eye observation under incoherent white light.
- Achieved four-image multiplexing under polarized light conditions.
- Demonstrated improved spatial resolution and reduced processing time and cost using nanosecond laser technology.
Conclusions:
- Laser-processed random plasmonic metasurfaces offer a flexible and energy-efficient method for creating customized, overt security features.
- The developed technology enables the production of centimeter-scale, tamper-proof images at low cost, suitable for commercial applications.
- High-speed fabrication and enhanced image quality make these metasurfaces viable for secured documents and anti-counterfeiting measures.
