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Optical physical unclonable function device and preparation method thereof

A physical and functional technology, applied in the field of physical unclonable functions, can solve problems such as being copied and forged

Pending Publication Date: 2022-02-08
INST OF ELECTRONICS ENG CHINA ACAD OF ENG PHYSICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

They are often used as security inks or structural colors, however their patterns are often produced using repeatable, deterministic processes, which presents a risk of duplication and counterfeiting

Method used

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  • Optical physical unclonable function device and preparation method thereof
  • Optical physical unclonable function device and preparation method thereof
  • Optical physical unclonable function device and preparation method thereof

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preparation example Construction

[0054] see figure 2 , in the embodiment of the present invention, the preparation method of optical physical unclonable function device includes:

[0055] S101: setting a lower film on the surface of the substrate.

[0056] In this step, it is first necessary to set a lower film on the surface of the substrate 1 . Specifically, this step may specifically include: electron beam evaporation of an Al film on the surface of the substrate 1, the substrate 1 may be specifically a sapphire substrate or a substrate 1 of other materials, and the lower film may specifically be an Al film or Au Film, Cu film, etc. are all available, depending on the details. The specific thickness of the above-mentioned lower film is usually about 100 nm. For the specific process of electron beam evaporation, reference may be made to the prior art, which will not be repeated here.

[0057] S102: disposing an upper film on the surface of the lower film facing away from the substrate to form a double-...

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Abstract

The invention discloses an optical physical unclonable function device which comprises a substrate. A chaos metasurface is located on the surface of one side of the substrate; the chaotic metasurface is generated by bombarding and etching a double-layer thin film arranged on the substrate; and quantum dots are compounded on the chaotic metasurface. A large-area chaos metasurface is generated through radiation chemical reaction generated in the process of bombardment etching of an ion beam on a double-layer nano film, nodes at different positions of a chaos nano net formed by the chaos metasurface show different branch modes, and ridge ends and branches similar to fingerprint features are shown, and the grids of the chaotic metasurface have randomness. The light-emitting behavior of the quantum dots is cut through the chaos metasurface, and the fluorescence speckles and the service life of the quantum dots are sensitive to the position of the metasurface through the surface plasmon effect, so that the optical physical unclonable function device can emit optical signals which cannot be accurately copied. The invention also provides a preparation method which also has the above beneficial effects.

Description

technical field [0001] The invention relates to the technical field of physical unclonable functions, in particular to an optical physical unclonable function device and a preparation method of the optical physical unclonable function device. Background technique [0002] Counterfeit products and counterfeit identities have brought serious security threats to the rapidly developing information age, and have caused huge losses and threats to all aspects of daily life such as human health, communications, trade, finance, and the Internet of Things. Therefore, the development of unbreakable anti-counterfeiting authentication technology has become an important research topic imminent. Optical nanomaterials and nanostructures have become one of the preferred solutions for high security level anti-counterfeiting and authentication due to their multifunctional coding capabilities and simple and easy detection methods. Among many optical nanomaterials and nanostructures, quantum do...

Claims

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Application Information

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IPC IPC(8): B82B3/00B82Y20/00
CPCB82B3/0009B82Y20/00
Inventor 李倩康健彬苏娟黄锋王丕东万永彪张泰平姚尧
Owner INST OF ELECTRONICS ENG CHINA ACAD OF ENG PHYSICS
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