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Efficient laser polishing and surface colouring

Relevance. High-performance laser ablation has recently gained interest in the scientific literature due to its technological applicability in the industry. Direct laser writing or laser ablation is a great technology because it can easily replicate completed shaped surfaces. But not always the highest ablation performance is accompanied by sufficient machining quality and desired color, which requires additional polishing and painting of the laser processed surface.
 
Scientific novelty. Recently, there have been works in the scientific literature investigating laser polishing [A. Krishnan et al. Review of the mechanism and process of surface polishing using lasers. Front. Mech. Eng. 14, 299 (2019)] and the development of colored surfaces [J.-M. Guay et al., Laser-induced plasmonic colors on metals, Nat. Commun. 8, 16095 (2017)]. These are new and under-researched areas of science and technology with a huge potential for breakthroughs as laser can easily polish and color the surfaces of a variety of metals. However, this type of work requires laser treatment of large areas, and with existing lasers, it takes a long time, and one of the main reasons is that it is not fully known how to use laser radiation efficiently. There are only a few publications on high-efficiency laser polishing and coloring. The scientific topic of this work is new and little explored.
 
Prospects. The aim of the proposed dissertation is to investigate experimentally and theoretically efficient laser polishing and coloring of metal surfaces. This is a very promising field of science and technology, because understanding how to improve the quality and productivity of laser polishing and the speed ofs coloring will allow efficient processing of large areas with available laser energy. All this will open up great prospects not only for the scientific community but also for Lithuanian laser manufacturers to expand the range of applicability of their manufactured devices.
 
For more information, please contact the theme supervisor M. Gedvilas