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Epsilon negative dynamic coded THz metamaterial beamformer for digital information encryption.

Eistiak Ahamed1, Rasool Keshavarz2, Negin Shariati2

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This study introduces a novel method for digital information encryption using epsilon-negative (ENG) metamaterials. The technique synchronizes phase difference and epsilon shifting for secure data transmission and image encryption applications.

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BeamformingCoded metamaterialDigital information encryptionEpsilon negativeMultilayer metamaterialPlasma metamaterial

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Area of Science:

  • Physics
  • Materials Science
  • Electrical Engineering

Background:

  • Light propagation through metamaterials offers potential for digital information encryption.
  • Achieving secure encryption requires precise control over phase difference and material epsilon shifting.

Purpose of the Study:

  • To design and demonstrate a metamaterial-based encryption system utilizing synchronized phase and epsilon properties.
  • To develop a metamaterial coded (MC) lens for secure image encryption and beam steering.

Main Methods:

  • Designing a metamaterial structure with Graphene and Gold layers to represent digital states 0 and 1.
  • Utilizing Gallium Arsenide (GaAs) for sidelobe manipulation and enhanced spatial resolution.
  • Implementing Doppler compression and 2D discrete Fourier transform for image encryption.

Main Results:

  • The metamaterial structure exhibits distinct epsilon values for states 0 (right-hand metamaterial, ε ≈ -7.20) and 1 (plasma metamaterial, ε ≈ -6.94) at 8.6 THz.
  • A phase difference of approximately π is achieved between the two states.
  • Beam steering is demonstrated within an angular range of -20° to 20°.

Conclusions:

  • The proposed MC lens effectively encrypts scanning images using synchronized phase and epsilon parameters.
  • The system demonstrates potential for applications in image encryption, security scanning, and modern cryptography.