Different regimes of viscous melt flow in laser ablation: from "clean" ablation to nanostructuring
2006 (English)In: High-Power Laser Ablation VI: 7 - 12 May 2006, Taos, New Mexico, USA ; [SPIE's International Symposium on High-Power Laser Ablation VI] / [ed] Claude R. Phipps, Bellingham, Wash: SPIE - International Society for Optical Engineering, 2006, 9-23 p.Conference paper (Refereed)
The paper reviews recent results on modeling a viscous liquid flow driven by ablation pressure. Based on the analysis of the Navier-Stokes equation various strongly different manifestations of this phenomenon are explained. These are: (i) a "clean" laser ablation, when laser spot has a clean sharp spot border, free from a re-solidified melt dross; (ii) a new form of material removal in laser ablation - expulsion on a poly(methyl methacrylate) target of long (up to 1 mm) nanofibers with a radius about 150-200 nm to the exterior of the spot under the action of a single pulse of KrF excimer laser; and (iii) a new way of laser surface nanostructuring - the formation of a surface foam having a structure of micro-pores interconnected with nanofilaments of diameters about 100 nm as a result of single pulse KrF laser irradiation of biopolymer films.
Place, publisher, year, edition, pages
Bellingham, Wash: SPIE - International Society for Optical Engineering, 2006. 9-23 p.
Proceedings of SPIE, the International Society for Optical Engineering, ISSN 0277-786X ; 6261
Research subject Manufacturing Systems Engineering
IdentifiersURN: urn:nbn:se:ltu:diva-38979DOI: 10.1117/12.669515Local ID: d8bdbf80-dd14-11db-9cae-000ea68e967bISBN: 0-8194-6326-4OAI: oai:DiVA.org:ltu-38979DiVA: diva2:1012487
SPIE's International Symposium on High-Power Laser Ablation : 07/05/2006 - 12/05/2006
Validerad; 2006; 20070328 (cira)2016-10-032016-10-03Bibliographically approved