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Related Experiment Video

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Soft Lithographic Functionalization and Patterning Oxide-free Silicon and Germanium

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Scalable Multistep Imprinting of Multiplexed Optical Anti-counterfeiting Patterns with Hierarchical Structures.

Chen Zhao^1,2,3, Sisi Yan^2,3, Lang Wang^2,3

¹Zhejiang University, Hangzhou, Zhejiang 310027, China.

|October 4, 2024

Summary

Researchers developed a novel multistep imprinting technique for high-capacity anti-counterfeiting. This method creates multiplexed encrypted patterns with hierarchical structures for enhanced security and easy decoding.

Keywords:

excellent readability hierarchical structure multiplexed optical anti-counterfeiting scale-up preparation

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Area of Science:

Materials Science
Optics
Nanotechnology

Background:

Multiplexed optical techniques offer advanced anti-counterfeiting solutions.
Simultaneously achieving high encryption, readability, and simple preparation remains a challenge.

Purpose of the Study:

To develop a versatile and scalable method for creating high-capacity anti-counterfeiting patterns.
To enhance encryption levels and readability through hierarchical structures.

Main Methods:

Utilized a multistep imprinting technique combined with surface work-hardening.
Created multiplexed encrypted patterns with coupled nano- and microstructures.
Incorporated perpendicular nano- and microgratings for multichannel encoding.

Main Results:

Achieved four-channel encoded patterns by integrating nano- and microgratings.
Patterns decoded into different information at varying view angles under white light.
Demonstrated compatibility with various metal/polymer materials.

Conclusions:

The developed method offers high-density information storage and direct visibility.
The technique supports broad material compatibility and low-cost mass production.
These high-performance anti-counterfeiting patterns have significant real-world application potential.