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Simulation, Fabrication and Characterization of THz Metamaterial Absorbers
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Graphene-Based Absorption-Transmission Multi-Functional Tunable THz Metamaterials.

Shulei Zhuang1, Xinyu Li1, Tong Yang1

  • 1Institute of Modern Optics, Nankai University, Tianjin Key Laboratory of Micro-Scale Optical Information Science and Technology, Tianjin Key Laboratory of Optoelectronic Sensor and Sensing Network Technology, Tianjin 300350, China.

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This study introduces a flexible, tunable metamaterial using graphene for adjustable broadband absorption and specific band transmission. Voltage control allows dynamic tuning of optical properties for versatile applications.

Keywords:
graphenemetamaterialsmulti-functionalterahertztunable

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Area of Science:

  • Metamaterials
  • Graphene-based devices
  • Terahertz (THz) technology

Background:

  • Metamaterials offer unique electromagnetic properties.
  • Graphene's tunable conductivity makes it suitable for dynamic control of electromagnetic responses.

Purpose of the Study:

  • To develop a multifunctional tunable metamaterial for absorption and transmission.
  • To investigate voltage-controlled tuning of optical properties using graphene.

Main Methods:

  • Fabrication of a metamaterial with patterned graphene layers on a flexible substrate.
  • Utilizing UV glue as a dielectric layer and polyethylene terephthalate (PET) as a substrate.
  • Applying voltage to modulate graphene's chemical potential for tunable absorption and transmission.

Main Results:

  • Achieved broadband absorption adjustable from 22% to 99% in the 0.72 THz–1.26 THz band.
  • Demonstrated tunable transmittance from 80% to 95% at 2.35 THz.
  • The metamaterial exhibited good flexibility and insensitivity to incident angle and polarization.

Conclusions:

  • The developed graphene-based metamaterial offers tunable absorption and transmission functionalities.
  • Its flexibility and conformal properties make it suitable for advanced optical applications.
  • Voltage-controlled tuning provides a dynamic mechanism for manipulating electromagnetic waves.