Metal Colorization Using Picosecond Laser Pulses

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Title: Metal Colorization Using Picosecond Laser Pulses
Authors: Guay, Jean-Michel
Date: 2019-03-12
Abstract: In the last few decades, the nanoscale fabrication of metallic structures has demonstrated promising applications in security (e.g. cryptography), photochemistry (e.g. plasmonassisted photo-chemistry), decoration (e.g. colouring), biocompatibility of implants and more. To fabricate such subwavelength nanostructures, we typically resort to the use of several nanolithography techniques that are lengthy and incompatible with large-scale production on complex substrates. For this purpose, we invented an innovative technique for the fast fabrication of nanostructures via the use of a picosecond laser. We used this technique to produce colourful coins for the Royal Canadian Mint which were presented at the World Money Fair in Germany in 2015 as a world rst. To ensure the long-term survival of these plasmonic colours, a new dual-layer passivation technique was conceived based on a atomic deposition process, to meet the commercialisation requirements of our industrial partner. A new burst colouring technology was also invented that allows for the creation of more visually appealing colours. These laser burst colours were also shown to have a high sensing potential and an overall better visual response to the application of the passivation layer.
URL: http://hdl.handle.net/10393/38894
http://dx.doi.org/10.20381/ruor-23146
CollectionThèses, 2011 - // Theses, 2011 -
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