A Highly Efficient Visible Absorber Coating on a Curved Substrate

Coatings

Ruoqian Gao¹  Heshig Bayan¹  Zhenfeng Shen¹  Yanchao Wang¹  Haigui Yang¹  Fei Yang¹  Zhen Liu¹  Hai Liu¹  Zizheng Li¹  Qiang Li¹  Xiaoyi Wang¹ 

[1] Key Laboratory of Optical System Advanced Manufacturing Technology, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China;

关键词: thin film;    coatings;    perfect absorber;   

DOI  :  10.3390/coatings10010071

来源: DOAJ

【 摘 要 】

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.

【 授权许可】

Unknown