Broadband selective solar absorber based on dielectric-filled anti-reflection coated film-coupled two-dimensional metallic photonic crystals

We propose and numerically demonstrate a highly efficient solar absorber based on dielectric-filled anti-reflection coated film-coupled two-dimensional metallic photonic crystals. The proposed solar absorber has a polarization-independent high absorptivity above 95% in the range of 0.33-1.45 µm with...

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Bibliographic Details
Published in:Japanese Journal of Applied Physics 2018-11, Vol.57 (11), p.110303
Main Authors: Li, Hui, Wu, Dong, Liu, Yumin, Liu, Chang, Li, Jing, Xu, Zenghui, Yang, Liu, Yu, Zhongyuan, Yu, Li, Ye, Han
Format: Article
Language:English
Subjects:
Absorptivity
Aluminum
Antireflection coatings
Broadband
Coupled modes
Nickel
Photonic crystals
Polaritons
Selectivity
Solar energy absorbers
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Summary:We propose and numerically demonstrate a highly efficient solar absorber based on dielectric-filled anti-reflection coated film-coupled two-dimensional metallic photonic crystals. The proposed solar absorber has a polarization-independent high absorptivity above 95% in the range of 0.33-1.45 µm with insensitivity to incident angle of light as large as 50°. In the range beyond 2.2 µm, the thermal emissivity of this structure is below 20%, which shows its strong absorption selectivity. The efficient light harvesting property of the proposed solar absorber can be attributed to the anti-reflection mode, cavity resonance and coupled surface plasmon polaritons.
ISSN:0021-4922
1347-4065
DOI:10.7567/JJAP.57.110303