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Encrypted Thermal Printing with Regionalization Transformation.

Run Hu1, Shiyao Huang1, Meng Wang2

  • 1State Key Laboratory of Coal Combustion, School of Energy and Power Engineering, Huazhong University of Science and Technology (HUST), Wuhan, 430074, China.

Advanced Materials (Deerfield Beach, Fla.)
|May 7, 2019
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Summary
This summary is machine-generated.

Researchers developed encrypted thermal printing using thermal metamaterials to hide information. This technology can display static or dynamic messages in infrared, enabling novel encryption and messaging applications.

Keywords:
illusion thermoticsregionalization transformationthermal metamaterialsthermal printing

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Area of Science:

  • Physics
  • Materials Science
  • Engineering

Background:

  • Conventional heat diffusion in materials limits thermal control.
  • Transformation thermotics, analogous to transformation optics, enables manipulation of heat flow.
  • Existing thermal metamaterials demonstrate functionalities like cloaking and concentration.

Purpose of the Study:

  • To propose and experimentally validate a novel concept of encrypted thermal printing.
  • To explore the potential of thermal metamaterials beyond basic heat distribution.
  • To enable the concealment and display of information using infrared signatures.

Main Methods:

  • Development of regionalization transformation for structuring thermal metamaterials.
  • Fabrication of thermal metamaterial-strokes to create infrared signatures.
  • Experimental validation of the encrypted thermal printing concept.

Main Results:

  • Successful demonstration of encrypted thermal printing capable of concealing information under natural light.
  • Ability to present static and dynamic messages in infrared imaging.
  • Creation of infrared signatures resembling letters, paintings, and dynamic displays.

Conclusions:

  • Thermal metamaterials offer unprecedented control over heat flow for advanced applications.
  • Encrypted thermal printing represents a significant advancement in information manipulation and security.
  • The developed strategy enables extreme manipulation of heat flow for encryption, illusions, and messaging.