Lorenz, Pierre - Risultato della ricerca

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Cleaning of laser-induced periodic surface structures on copper by gentle wet chemical processing / Lorenz, Pierre (TROPOS, Leibniz) ; Ehrhardt, Martin (TROPOS, Leibniz) ; Lotnyk, Andriy (TROPOS, Leibniz) ; Griebel, Jan (TROPOS, Leibniz) ; Zimmer, Klaus (TROPOS, Leibniz) ; Zajadacz, Joachim (TROPOS, Leibniz) ; Himmerlich, Marcel (CERN) ; Bez, Elena (CERN ; Leipzig U.) ; Taborelli, Mauro (CERN) ; Rosenow, Steffen (Leipzig U.) et al.
•Cleaning of 365 nm LIPSS from debris of with microemulsions has been demonstrated.•Excellent debris and particles removal while maintaining the LIPSS pattern were found.•The cleaning mechanism is dominated of selective dissolution of nanomaterial and oxides. Laser-induced periodic surface structures (LIPSS) attract considerable attention due to the manifold applications enabled by these self-organised structures ranging from optical colouring to bio-mimicking or wetting effects. [...]
2024 - 10 p. - Published in : Appl. Surf. Sci. 679 (2025) 161115 Fulltext: PDF;

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Hot electron enhanced photoemission from laser fabricated plasmonic photocathodes / Martinez-Calderon, Miguel (CERN) ; Groussin, Baptiste (CERN) ; Bjelland, Victoria (CERN ; Norwegian U. Sci. Tech.) ; Chevallay, Eric (CERN) ; Fedosseev, Valentin N (CERN) ; Himmerlich, Marcel (CERN) ; Lorenz, Pierre ; Manjavacas, Alejandro ; Marsh, Bruce A (CERN) ; Neupert, Holger (CERN) et al.
Photocathodes are key elements in high-brightness electron sources and ubiquitous in the operation of large-scale accelerators, although their operation is often limited by their quantum efficiency and lifetime. Here, we propose to overcome these limitations by utilizing direct-laser nanostructuring techniques on copper substrates, improving their efficiency and robustness for next-generation electron photoinjectors. [...]
2023 - 9 p. - Published in : 10.1515/nanoph-2023-0552 Fulltext: PDF;

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Pulse Duration Dependence of Infrared Laser-Induced Secondary Electron Yield Reduction of Copper Surfaces / Lorenz, Pierre (TROPOS, Leibniz) ; Bez, Elena (CERN ; Leipzig U.) ; Himmerlich, Marcel (CERN) ; Ehrhardt, Martin (CERN) ; Taborelli, Mauro (CERN) ; Zimmer, Klaus
The irradiation of metals with ultrashort laser pulses enables the rapid and cost-effective production of nanostructured surfaces with a wide range of industrial applications. The laser-induced surface roughening modifies the interaction processes upon electron impact, leading to a modification of the secondary electron emission [...]
2023 - 6 p. - Published in : 10.2961/jlmn.2023.03.2002 Fulltext: PDF;

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Secondary electron yield engineering of copper surfaces using ultra short infrared laser pulses / Lorenz, Pierre ; Himmerlich, Marcel (CERN) ; Ehrhardt, Martin ; Bez, Elena (CERN) ; Bogdanowicz, Karolina (CERN) ; Taborelli, Mauro (CERN) ; Zimmer, Klaus
The texturing of copper surfaces with ultrashort laser pulses leads to microscopic groove formation but results also in nanostructure development at the surface. Both structure types, micro- and nanostructures, are influenced by the laser processing parameters such as the laser power, the scanning speed, the repetition rate, and the line spacing. [...]
2022 - Published in : 10.1117/12.2609463
In : Laser-based Micro- and Nanoprocessing XVI, San Francisco, California, United States, 22 -27 Jan 2022

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Influence of wavelength and accumulated fluence at picosecond laser-induced surface roughening of copper on secondary electron yield / Bez, Elena (CERN ; Leipzig U.) ; Himmerlich, Marcel (CERN) ; Lorenz, Pierre ; Ehrhardt, Martin ; Gunn, Aidan Graham (CERN) ; Pfeiffer, Stephan (CERN) ; Rimoldi, Martino (CERN) ; Taborelli, Mauro (CERN) ; Zimmer, Klaus ; Chiggiato, Paolo (CERN) et al.
Ultrashort-pulse laser processing of copper is performed in air to reduce the secondary electron yield (SEY). By UV (355 nm), green (532 nm), and IR (1064 nm) laser-light induced surface modification, this study investigates the influence of the most relevant experimental parameters, such as laser power, scanning speed, and scanning line distance (represented as accumulated fluence) on the ablation depth, surface oxidation, topography, and ultimately on the SEY. [...]
2023 - 10 p. - Published in : J. Appl. Phys. 133 (2023) 035303 Fulltext: PDF;

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Vedi anche: autori con nomi simili
13	Lorenz, P
4	Lorenz, Pascal
1	Lorenz, Patrick
1	Lorenz, Peter

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