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Broadband thin-film and metamaterial absorbers using refractory vanadium nitride and their thermal stability

Broadband thin-film and metamaterial absorbers using refractory vanadium nitride and their thermal stability
Broadband thin-film and metamaterial absorbers using refractory vanadium nitride and their thermal stability

Strong absorption of the full spectrum of sunlight at high temperatures is desired for photothermal devices and thermophotovoltaics. Here, we experimentally demonstrate a thin-film broadband absorber consisting of a vanadium nitride (VN) film and a SiO 2 anti-reflective layer. Owing to the intrinsic high loss of VN, the fabricated absorber exhibits high absorption over 90% in the wide range of 400-1360 nm. To further enhance the near-infrared absorption, we also propose a metamaterial absorber by depositing patterned VN square patches on the thin-film absorber. An average absorption of 90.4% over the range of 400-2500 nm is achieved due to the excitation of broad electric dipole resonance. Both thin-film and metamaterial absorbers are demonstrated to possess excellent incident angle tolerances (up to 60°) and superior thermal stability at 800 ℃. The proposed refractory VN absorbers may be potentially used for solar energy harvesting, thermal emission, and photodetection.

1094-4087
Wang, Wenhao
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Wang, Hanbin
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Yu, Peng
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Sun, Kai
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Tong, Xin
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Lin, Feng
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Wu, Cuo
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You, Yimin
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Xie, Wuze
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Li, Yunpeng
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Yuan, Chenzhi
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Govorov, Alexander O.
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Muskens, Otto L.
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Xu, Hongxing
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Sun, Song
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Wang, Zhiming
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Wang, Wenhao
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Wang, Hanbin
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Yu, Peng
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Sun, Kai
b7c648a3-7be8-4613-9d4d-1bf937fb487b
Tong, Xin
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Lin, Feng
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Wu, Cuo
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You, Yimin
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Xie, Wuze
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Li, Yunpeng
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Yuan, Chenzhi
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Govorov, Alexander O.
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Muskens, Otto L.
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Xu, Hongxing
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Sun, Song
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Wang, Zhiming
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Wang, Wenhao, Wang, Hanbin, Yu, Peng, Sun, Kai, Tong, Xin, Lin, Feng, Wu, Cuo, You, Yimin, Xie, Wuze, Li, Yunpeng, Yuan, Chenzhi, Govorov, Alexander O., Muskens, Otto L., Xu, Hongxing, Sun, Song and Wang, Zhiming (2021) Broadband thin-film and metamaterial absorbers using refractory vanadium nitride and their thermal stability. Optics Express, 29 (21), [33456]. (doi:10.1364/OE.439546).

Record type: Article

Abstract

Strong absorption of the full spectrum of sunlight at high temperatures is desired for photothermal devices and thermophotovoltaics. Here, we experimentally demonstrate a thin-film broadband absorber consisting of a vanadium nitride (VN) film and a SiO 2 anti-reflective layer. Owing to the intrinsic high loss of VN, the fabricated absorber exhibits high absorption over 90% in the wide range of 400-1360 nm. To further enhance the near-infrared absorption, we also propose a metamaterial absorber by depositing patterned VN square patches on the thin-film absorber. An average absorption of 90.4% over the range of 400-2500 nm is achieved due to the excitation of broad electric dipole resonance. Both thin-film and metamaterial absorbers are demonstrated to possess excellent incident angle tolerances (up to 60°) and superior thermal stability at 800 ℃. The proposed refractory VN absorbers may be potentially used for solar energy harvesting, thermal emission, and photodetection.

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More information

Accepted/In Press date: 22 September 2021
e-pub ahead of print date: 29 September 2021
Published date: 11 October 2021

Identifiers

Local EPrints ID: 453630
URI: http://eprints.soton.ac.uk/id/eprint/453630
ISSN: 1094-4087
PURE UUID: 4910c866-4ce6-41bf-b2b6-22edff02366b
ORCID for Otto L. Muskens: ORCID iD orcid.org/0000-0003-0693-5504

Catalogue record

Date deposited: 20 Jan 2022 17:39
Last modified: 28 Apr 2022 02:02

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Contributors

Author: Wenhao Wang
Author: Hanbin Wang
Author: Peng Yu
Author: Kai Sun
Author: Xin Tong
Author: Feng Lin
Author: Cuo Wu
Author: Yimin You
Author: Wuze Xie
Author: Yunpeng Li
Author: Chenzhi Yuan
Author: Alexander O. Govorov
Author: Otto L. Muskens ORCID iD
Author: Hongxing Xu
Author: Song Sun
Author: Zhiming Wang

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