Add to BibSonomy
Abstract
For many applications, large curvature surfaces or complicated 3D structures are required to absorb light that falls on them to reduce stray light or energy collection. A novel, to the best of our knowledge, strategy with a metal–dielectric film stack by the atomic layer deposition technique is put forward to achieve broadband absorption coating covering both sides of a quartz tube completely. Absorptive metallic material of titanium–aluminum–carbon composite and dielectric material of aluminum oxide (${{\rm Al}_2}{{\rm O}_3}$) is employed to realize high absorption (${\gt}{99}\%$) for the 400–780 nm band with the configuration of a six-layer metal–dielectric film stack. Good angle insensitivity up to 50° for $P$- and $S$-polarizations is demonstrated experimentally with the proposed structure on a glass slab. The average absorption of the coated quartz tube reaches as high as 99% for all curving areas on the inner and outer sides, while the nonuniformity is confined to 1.5% for the axial and circumferential directions. This presented approach has enormous potential in the fields of optical detection, optical imaging, optical sensing, and energy management.
© 2021 Optical Society of America
Full Article | PDF ArticleMore Like This
Ling-Shan Gao, Qing-Yuan Cai, Er-Tao Hu, Jing Zhou, Yao-Peng Li, Hai-Han Luo, Bao-Jian Liu, Yu-Xiang Zheng, and Ding-Quan Liu
Opt. Express 29(9) 13815-13828 (2021)
Kristin Gerold, Vivek Beladiya, Pallabi Paul, David Kästner, Mikael Saarniheimo, Kalle Niiranen, Sven Schröder, and Adriana Szeghalmi
Appl. Opt. 62(7) B92-B96 (2023)
Adriana Szeghalmi, Michael Helgert, Robert Brunner, Frank Heyroth, Ulrich Gösele, and Mato Knez
Appl. Opt. 48(9) 1727-1732 (2009)