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Simulation, Fabrication and Characterization of THz Metamaterial Absorbers
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Nickel-Based High-Bandwidth Nanostructured Metamaterial Absorber for Visible and Infrared Spectrum.

Rana Muhammad Hasan Bilal1, Muhammad Ahsan Saeed2, Muhammad Ashar Naveed1

  • 1Innovative Technologies Laboratories (ITL), King Abdullah University of Science and Technology (KAUST), Thuwal 23955, Saudi Arabia.

Nanomaterials (Basel, Switzerland)
|October 14, 2022
PubMed
Summary
This summary is machine-generated.

This study presents a simple, cost-effective nickel nanostructure absorber with high bandwidth and polarization insensitivity. It achieves 93% average absorption across a wide optical range, suitable for advanced applications.

Keywords:
absorberhigh bandwidthmetamaterialnanostructurednickelpolarization insensitivevisible

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Area of Science:

  • Nanophotonics and Metamaterials
  • Optical Engineering
  • Materials Science

Background:

  • Efficient nanoscale optical light control is crucial for applications like thermal imaging and energy harvesting.
  • Existing absorbers face challenges in bandwidth, thermal stability, angular stability, and miniaturization.

Purpose of the Study:

  • To demonstrate a simple, cost-effective, high-bandwidth nanostructured absorber.
  • To design a miniaturized absorber with desirable optical and thermal properties.

Main Methods:

  • Fabrication of a nanoscale absorber using a simple circular ring of nickel metal.
  • Characterization of absorption spectra across a broad optical window (400–2800 nm).
  • Analysis of absorption performance under various incident and polarization angles.

Main Results:

  • The nickel nanostructure absorber exhibits an average absorption of 93% from 400 to 2800 nm.
  • The absorber maintains an average absorption of 80% even at oblique incident angles.
  • The design is miniaturized, easily fabricable, polarization-insensitive, and cost-effective.

Conclusions:

  • The proposed nickel nano-absorber offers a compelling solution for high-bandwidth absorption.
  • Its properties make it suitable for energy harvesting, thermal photovoltaics, and emission applications.
  • The simple geometry and material robustness (nickel) enhance its practical viability.