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A broadband omnidirectional absorber incorporating plasmonic metasurfaces

Abstract

An omnidirectional broadband absorber incorporating 170 nm thick metasurfaces is proposed, where silicon dioxide cylinder arrays with a low aspect ratio is covered by an 80 nm thick titanium nitride metal. The developed absorber achieves a peak absorption of 0.97 (0.96, experiment), with the average absorption up to 0.93 (0.91, experiment), for the wavelength of 250 nm to 800 nm. And its absorptions show an angular tolerance up to 60° for the simultaneous excitation of the surface plasmon resonance and the cavity resonance. Moreover, an average absorption of ~ 0.8 for the wavelength of 250 nm to 400 nm is obtained with the rear illumination due to the light trapping of the titanium nitride metal. Remarkably, a large-scale (1 cm × 3 cm) absorber is fabricated by the continuously variable spatial frequency photolithography. This device outperforms previously reported absorbers in cost and shows great potential in applications as photothermal and ultraviolet protection.

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Publication details

The article was received on 01 Sep 2018, accepted on 11 Oct 2018 and first published on 12 Oct 2018


Article type: Paper
DOI: 10.1039/C8TC04385J
Citation: J. Mater. Chem. C, 2018, Accepted Manuscript
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    A broadband omnidirectional absorber incorporating plasmonic metasurfaces

    W. shangliang, Y. Yan and L. Chen, J. Mater. Chem. C, 2018, Accepted Manuscript , DOI: 10.1039/C8TC04385J

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