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A titanium-based hollow-cube metamaterial for efficient broadband solar absorption.
Zhuocheng Xue1, Shubo Cheng1, Huafeng Zhang1
1School of Physics and Optoelectronic Engineering, Yangtze University, Jingzhou, Hubei 434023, China. shubocheng@yangtzeu.edu.cn.
Dalton Transactions (Cambridge, England : 2003)
|March 31, 2026
Summary
This study introduces a novel broadband solar absorber using a metal-dielectric-metal structure. The design achieves high solar-weighted absorption efficiency, demonstrating potential for efficient solar energy harvesting.
Area of Science:
- Materials Science
- Nanotechnology
- Renewable Energy
Background:
- Broadband solar absorbers are crucial for efficient solar thermal conversion.
- Existing designs face limitations in thermal stability and structural complexity.
Purpose of the Study:
- To develop a novel refractory metal-based metamaterial absorber with enhanced broadband absorption.
- To investigate its photothermal conversion efficiency and robustness.
Main Methods:
- Finite difference time domain (FDTD) simulations were employed to analyze the metal-dielectric-metal structure.
- Theoretical analysis explored the physical mechanisms of broadband absorption.
Main Results:
- The proposed Ti/Al2O3/Ti structure achieved >90% absorption from 280-3138 nm.
- A solar-weighted absorption efficiency of 92.8% was demonstrated.
- The design showed robustness against polarization and incident angle variations.
Conclusions:
- The novel absorber design offers superior thermal stability and structural simplicity compared to existing methods.
- It is suitable for solar energy harvesting, thermal radiation control, and optoelectronic devices.
- This work advances research in efficient solar energy utilization.
