4 May 2015 Diffuse reflectivity of gold plating with high power laser irradiation
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Proceedings Volume 9543, Third International Symposium on Laser Interaction with Matter; 954309 (2015) https://doi.org/10.1117/12.2181603
Event: Third International Symposium on Laser Interaction with Matter, 2014, Jiangsu, China
Abstract
The discoloration and optical characteristics of the gold plating film under long-time high power laser irradiation are investigated. The fabrication process of gold plating on nickel underplate on rough surface of copper and aluminum alloy substrates is introduced. The measurement results of the diffuse reflectivity for the samples with different surface roughness indicate that roughness of the gold layer surface should be 4μm to obtain the maximum value of diffuse reflectivity. The discoloration and variation of diffuse reflectivity are experimentally studied under 2000W irradiation. The research results show that the discoloration and degrading of reflectivity are caused by the diffusion of Ni to the gold plating surface and forming NiO thin film due to the porosity of the gold film and high temperature treatment. A change of diffuse reflectivity related mechanism is described. Several plating solution recipes are used to eliminate the discoloration and mitigate the degrading of the reflectivity on gold surface.
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Yong Wu, Yong Wu, Lei Zhang, Lei Zhang, Pengling Yang, Pengling Yang, Zhenbao Wang, Zhenbao Wang, Mengmeng Tao, Mengmeng Tao, Fuhua Liu, Fuhua Liu, Guobin Feng, Guobin Feng, } "Diffuse reflectivity of gold plating with high power laser irradiation", Proc. SPIE 9543, Third International Symposium on Laser Interaction with Matter, 954309 (4 May 2015); doi: 10.1117/12.2181603; https://doi.org/10.1117/12.2181603
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