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Related Experiment Video

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Simulation, Fabrication and Characterization of THz Metamaterial Absorbers
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Ultra-Broadband High-Efficiency Solar Absorber Based on Double-Size Cross-Shaped Refractory Metals.

Hailiang Li1, Jiebin Niu1, Congfen Zhang2

  • 1Key Laboratory of Microelectronic Devices & Integrated Technology, Institute of Microelectronics, Chinese Academy of Sciences, Beijing 100029, China.

Nanomaterials (Basel, Switzerland)
|March 25, 2020
PubMed
Summary

This study demonstrates an ultra-broadband, high-efficiency solar absorber using titanium and titanium nitride. The novel design achieves wide absorption spectrum for advanced solar energy applications.

Keywords:
FDTDbroadband absorptionpropagating plasmon resonancerefractory metalsolar energy absorber

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Area of Science:

  • Materials Science
  • Optics
  • Nanotechnology

Background:

  • Developing efficient solar absorbers is crucial for renewable energy technologies.
  • Existing absorbers often struggle with ultra-broadband absorption and high efficiency.

Purpose of the Study:

  • To theoretically investigate an ultra-broadband, high-efficiency solar absorber.
  • To explore the use of refractory metals titanium (Ti) and titanium nitride (TiN) for enhanced light absorption.

Main Methods:

  • Utilized finite-difference time-domain (FDTD) theoretical simulation.
  • Analyzed field distribution to understand physical mechanisms.
  • Investigated the influence of structural parameters, polarization, and incident angle.

Main Results:

  • Achieved ultra-broadband absorption (>90% over 1182 nm from 415.648-1597.39 nm).
  • Identified combined propagating and local surface plasmon resonance as the absorption mechanism.
  • Evaluated performance under the Air Mass 1.5 (AM1.5) solar spectrum.

Conclusions:

  • The proposed Ti/TiN cross-shaped absorber exhibits excellent broadband absorption characteristics.
  • The absorber is suitable for applications in solar energy harvesting, thermal photovoltaics, and hot-electron devices.