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Optical Engineering

Temporal pulse manipulation and consequences for ultrafast laser processing of materials
Author(s): Razvan Stoian; Alexandre Mermillod-Blondin; Sebastian Winkler; Arkadi Rosenfeld; Ingolf Volker Hertel; Maria Spyridaki; Emmanuel Koudoumas; P. Tzanetakis; Costas Fotakis; Igor M. Burakov; Nadezhda M. Bulgakova
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Paper Abstract

Following advances in ultrafast laser technology as a reliable tool for material probing and processing, we discuss various options for control and optimization. The possibility to tailor the temporal shape of ultrashort laser pulses enables extended opportunities for material processing. The concept of optimizing laser interactions is based on the possibility to regulate the energy delivery so that control of laser-induced phenomena can be achieved and quality structures can be realized. An experimental demonstration of the possibility to design excitation sequences tailored with respect to the material response is described, laying the groundwork for adaptive optimization in materials structuring. We show that under particular irradiation conditions involving modulated excitation, the energy flow can be controlled and the material response can be guided to improve processing results. This is particularly important for processing brittle materials. Further examples are given to illuminate the possibility to optimize the kinetic properties of ions emitted from laser-irradiated semiconductors, using excitation sequences synchronized with the solid-to-liquid transformation time. Versatile sub-kilo-electron-volt ion beams are obtained, exploiting transitions to supercritical fluid states with minimal energetic expenses. Temporally selective irradiation can thus open up efficient thermodynamic paths, unfolding interesting perspectives for "intelligent," feedback-assisted processing of materials.

Paper Details

Date Published: 1 May 2005
PDF: 10 pages
Opt. Eng. 44(5) 051106 doi: 10.1117/1.1915467
Published in: Optical Engineering Volume 44, Issue 5
Show Author Affiliations
Razvan Stoian, Univ. Jean Monnet Saint-Etienne (France)
Alexandre Mermillod-Blondin, Max-Born-Institut für Nichtlineare Optik und Kurzzeitspektroskopie (Germany)
Sebastian Winkler, Max-Born-Institut für Nichtlineare Optik und Kurzz (Germany)
Arkadi Rosenfeld, Max-Born-Institut für Nichtlineare Optik und Kurzzeitspektroskopie (Germany)
Ingolf Volker Hertel, Max-Born-Institut für Nichtlineare Optik und Kurzzeitspektroskopie (Germany)
Maria Spyridaki, Foundation for Research and Technology-Hellas (Greece)
Emmanuel Koudoumas, Foundation for Research and Technology-Hellas (Greece)
P. Tzanetakis, Foundation for Research and Technology-Hellas (Greece)
Costas Fotakis, Foundation for Research and Technology-Hellas (Greece)
Igor M. Burakov, Institute of Thermophysics (Russia)
Nadezhda M. Bulgakova, Institute of Thermophysics (Russia)

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