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Open AccessArticle

A Highly Efficient Visible Absorber Coating on a Curved Substrate

1
Key Laboratory of Optical System Advanced Manufacturing Technology, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China
2
College of Da Heng, University of Chinese Academy of Sciences, Beijing 100049, China
3
Chang Chun Champion Optics Co., Ltd., Changchun 130000, China
*
Authors to whom correspondence should be addressed.
Coatings 2020, 10(1), 71; https://doi.org/10.3390/coatings10010071
Received: 13 December 2019 / Revised: 7 January 2020 / Accepted: 10 January 2020 / Published: 13 January 2020
(This article belongs to the Section Thin Films)
In this study, we propose and fabricate a perfect absorber on a planar substrate using alternate silicon dioxide and ultrathin metallic lossy chromium (Cr) films. Furthermore, we transfer the absorber to a curved substrate via an optimization design of symmetric structures. The absorber exhibits a highly efficient absorption and large incident-angular tolerance characteristics in the whole visible region. We investigate each layer contribution to the absorption theoretically, and find that ultrathin (~5 nm) lossy Cr films play a dominant absorptive role. Using the effective interface method, we calculate the phase difference on the lossy Cr front surface. It is close to the destructive interference condition, from which we clarify why the proposed structures can produce a highly efficient absorption. View Full-Text
Keywords: thin film; coatings; perfect absorber thin film; coatings; perfect absorber
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MDPI and ACS Style

Gao, R.; Bayan, H.; Yang, F.; Wang, Y.; Liu, Z.; Liu, H.; Shen, Z.; Li, Q.; Li, Z.; Wang, X.; Yang, H. A Highly Efficient Visible Absorber Coating on a Curved Substrate. Coatings 2020, 10, 71.

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