A refractory metamaterial absorber for ultra-broadband, omnidirectional and polarization-independent absorption in the UV-NIR spectrum

In this paper, efficient ultra-broadband absorption from ultraviolet (UV) to near infrared (NIR) is achieved using a metamaterial perfect absorber (MPA) with refractory constituents. Both simulated and experimental results indicate that this proposed MPA exhibits an average absorption over 95% at wa...

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Bibliographic Details
Published in:Nanoscale 2018-01, Vol.1 (17), p.8298-833
Main Authors: Huang, Yijia, Liu, Ling, Pu, Mingbo, Li, Xiong, Ma, Xiaoliang, Luo, Xiangang
Format: Article
Language:English
Subjects:
Absorbers (materials)
Absorption
Broadband
Energy conversion
Metamaterials
Near infrared radiation
Photothermal conversion
Thermal stability
Thermophotovoltaics
Wave reflection
Wavelengths
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Summary:In this paper, efficient ultra-broadband absorption from ultraviolet (UV) to near infrared (NIR) is achieved using a metamaterial perfect absorber (MPA) with refractory constituents. Both simulated and experimental results indicate that this proposed MPA exhibits an average absorption over 95% at wavelengths ranging from 200 nm to 900 nm. Besides, owing to the ultrathin thickness and symmetrical topology of this device, it exhibits great angular tolerance up to 60° independent of the incident polarizations. Excellent thermal stability is also demonstrated at high operation temperatures. The physical origin of the ultra-broadband characteristics is mainly based on diffraction/interference engineering at short wavelengths and the anti-reflection effect at long wavelengths. We believe that such a device may find potential applications ranging from photodetection and photothermal energy conversion to ultraviolet protection and thermophotovoltaics. In this paper, efficient ultra-broadband absorption from ultraviolet (UV) to near infrared (NIR) is achieved using a metamaterial perfect absorber (MPA) with refractory constituents.
ISSN:2040-3364
2040-3372
DOI:10.1039/c8nr01728j