We are pleased to announce and invite you to one of our weekly online zoom events.
 

Plasmonic coloring of noble metals with burst-mode ultrashort pulse lasers

Functionalization of surfaces with ultrashort pulsed lasers has received fast growing demand from the industry due to the upscaling of laser power available on the market. Nano-scale topographies generated by LIPSS and DLIP allow for controlling of the wetting properties of surfaces as well as optical and tribological surfaces, like super black or low friction surfaces. However, generating and embedding nano particles (NPs) on metal surfaces has not been exploited, yet for industrial applications. It enables the generation of coloring the surfaces by creating plasmonic resonances.

With the proper choice of the laser fluence, number of pulses in a burst and scanning speed, nano particles of the noble metals like Silver and Copper are created, redeposited on the surface, and embedded into a thin layer of melt phase. The control of the size of the NPs and the depths of embedding in the melt pool are the determining parameters for the absorption resonance and therefore the color of the NPs. Therefore, the control of the transient interplay of ablation, NP redeposition and melt layer generation is of paramount importance to obtain vibrant colors


Speaker

Prof. Dr. Rainer Kling, Bern University of Applied Sciences
Rainer Kling currently holds a position as professor for laser technology at Bern University of Applied Sciences in Switzerland. His expertise in centered around high precision materials processing with ultrashort pulsed lasers, in particular drilling, engraving, selective ablation, and surface functionalization as well as intra-volume modification of transparent materials. From 2011 to 2023 he worked as business unit manager for laser micro machining at Alphanov, a technology center for lasers, based in Bordeaux, France. From 2002 -2011 he has been working at Laser Center in Hannover (LZH) where he headed the Department of Production and Systems Technology. He holds a PhD degree in Physics from the Leibniz University of Hannover. He has published around 200 papers and conference presentations. In 2020 he was awarded the SPIE fellowship for his continued scientific contributions to the laser community. 

Moderator

Dr. Christian Bosshard, Managing Director Swissphotonics
Dr. Christian Bosshard received his degree in Physics (1986) and his doctorate (1991, Silver medal award) from ETH. From 2001-2021 he was working at CSEM, first as Section Head and then as Vice President and Head Photonics. Since 2013 he is Managing Director of Swissphotonics. Christian is a Fellow of Optica, Board Member of EPIC, and Member of the Board of the University of Basel.

Date
Tuesday, 13 May 2025

Time
12:00 - 12:45

Software
Zoom

Costs
free of charge

Registration only necessary once
This event series requires registration (see link above). We will send you the access information (Zoom-link and ID) by email after the registration. As the Zoom link remains the same every week, you do not need to register again for the following meetings.

Contact
Prof. Dr. Rainer Kling
Bern University of Applied Sciences

Contact Swissphotonics
Dr. Christian Bosshard
Managing Director Swissphotonics
+41 79 405 1826

6 January 2025, Christian Bosshard