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

Abstract

In this paper, efficient ultra-broadband absorption from ultraviolet (UV) to near infrared (NIR) is achieved by 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 60o independent of the incident polarizations. Excellent thermal stability is also demonstrated at high operation temperatures. The physical origin for the ultra-broadband characteristics is mainly based on the diffraction/interference engineering at short wavelengths and the anti-reflection effect at long wavelengths. We believe that such device may find potential applications ranging from photodetection and photothermal energy conversion to ultraviolet protection and thermophotovoltaics.

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Publication details

The article was received on 01 Mar 2018, accepted on 02 Apr 2018 and first published on 02 Apr 2018


Article type: Paper
DOI: 10.1039/C8NR01728J
Citation: Nanoscale, 2018, Accepted Manuscript
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    Refractory metamaterial absorber for ultra-broadband, omnidirectional and polarization-independent absorption in the UV-NIR spectrum

    Y. Huang, L. Liu, M. Pu, X. Li, X. Ma and X. Luo, Nanoscale, 2018, Accepted Manuscript , DOI: 10.1039/C8NR01728J

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