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24 November 2021 Large area and broadband gold-black absorber and the nanocone-like array model
Yan Hao, Yanze Gao, Suhui Yang, Zhuo Li, Yingqi Liao, Xin Wang, Yongming Zhao, Jinying Zhang
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Proceedings Volume 12062, AOPC 2021: Optoelectronics and Nanophotonics; 120620H (2021) https://doi.org/10.1117/12.2605807
Event: Applied Optics and Photonics China 2021, 2021, Beijing, China
Abstract
Broadband light absorbers are attractive for their applications in photodetection and thermal detectors. Metal-black coatings have been experimentally proven to have broadband light absorption characteristic. A large area and broadband gold-black coating was fabricated by a low-cost but effective sputtering process. The gold-black films exhibited reduced reflection of 4.81%, 2.48% and 1.93% for sputtering pressure of 50, 65 and 80 Pa in 300-800 nm spectral range, and their size reached 4- inches. A three-dimensional nanocone-like array model was proposed for the gold-black films. Then, the nanocone array of this model was embedded with many gold nanoparticles due to the rough surface of the gold-black films. The results indicated this proposed model of nanocone-like array embedded with nanoparticles can be a good tool to design broadband gold-black absorbers.
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Yan Hao, Yanze Gao, Suhui Yang, Zhuo Li, Yingqi Liao, Xin Wang, Yongming Zhao, and Jinying Zhang "Large area and broadband gold-black absorber and the nanocone-like array model", Proc. SPIE 12062, AOPC 2021: Optoelectronics and Nanophotonics, 120620H (24 November 2021); https://doi.org/10.1117/12.2605807
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KEYWORDS
Reflection
Sputter deposition
Nanoparticles
3D modeling
Scanning electron microscopy
Gold
Absorption
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