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Andreas Ostendorf

Prof. Andreas  Ostendorf

Professor of Mechanical Engineering
Ruhr-University Bochum

Laser Applications Technology
Ruhr-University Bochum

Bochum  44780
Germany

tel: +49 234 32 25233
fax: +49 234 32 14259
E-mail: andreas.ostendorf@ruhr-uni-bochum.de
Web: www.lat.rub.de

Area of Expertise

Micromachining and nanostructuring with short pulse and ultrafast lasers, basics and applications of thinfilm and bulk laser machining, laser ablation and photopolymerization

Biography

Andreas Ostendorf studied Electrical Engineering at the University Hannover, Germany. He got his PhD in 2000 in Mechanical Engineering. As a PhD student he worked in the field of micromachining using femtosecond laser pulses and understanding the differences in the interaction phenomena compared to uv nanosecond lasers. After becoming the director of the Laser Zentrum Hannover in 2000 he focused his work on nanostructuring beyond the diffraction limit by using ultrashort laser pulses with particular emphasis on two-photon polymerization and ablation of thin films. Since 2008 Andreas Ostendorf is full professor for Mechanical Engineering at the Ruhr-University Bochum, Germany. The working areas of his institute comprise investigations into the photopolymerization of nanocompounds, the generation of nanoparticles by laser ablation and the basic understanding of nonlinear processes to achieve nanostructures below the 100 nm range. Andreas Ostendorf is a Fellow of SPIE and the Laser Institute of America LIA.

Lecture Title(s)

"Understanding the interplay between materials and short laser pulses in micro- and nanostructuring:" This lecture will give a basic and comprehensive overview on how short and ultrashort laser pulses are absorbed by a certain material and which thermophysical processes can be induced in order to achieve a specific structuring result. The role of the electrons and the energy flows in the material will be analyzed as the key driving mechanism in the ablation process. Different process regimes can be used mainly depending on the fluences on the workpiece. Also the ablation products will be considered since depending on the environment and the used parameters nanoparticles can be in-situ synthesized from evaporation. Two-photon-polymerization is another emerging process with possibilities to generate full 3D-nanostructures. Although the process is different from ablation with respect to photochemical effects similarities do exist and possibilities will be shown to further decrease structure sizes. Finally, a number of different applications will be shown ranging from photovoltaics to biomedical engineering. This will demonstrate that the technology is not just of scientific interest but also has important industrial implications.

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