Formation of laser induced periodic surface structures (LIPSS) on Ti upon double fs pulse exposure

0478131 - FZÚ 2018 RIV US eng C - Konferenční příspěvek (zahraniční konf.)
Gemini, Laura - Hashida, M. - Nishii, T. - Miyasaka, Y. - Inoue, S. - Limpouch, J. - Mocek, Tomáš - Sakabe, S.
Formation of laser induced periodic surface structures (LIPSS) on Ti upon double fs pulse exposure.
Laser-Based Micro- and Nanoprocessing IX. Bellingham: SPIE, 2015 - (Klotzbach, U.; Washio, K.; Arnold, C.), s. 1-8, č. článku 935117. Proceedings of SPIE, 9351. ISBN 978-162841441-7. ISSN 0277-786X.
[Laser-Based Micro- and Nanoprocessing IX. San Francisco (US), 10.02.2015-12.02.2015]
Grant CEP: GA MŠMT ED2.1.00/01.0027; GA MŠMT EE2.3.20.0143
Grant ostatní: HILASE(XE) CZ.1.05/2.1.00/01.0027; OP VK 6(XE) CZ.1.07/2.3.00/20.0143
Institucionální podpora: RVO:68378271
Klíčová slova: laser induced periodic surface structures * LIPSS * femtosecond laser * titanium * double pulse irradiation
Obor OECD: Optics (including laser optics and quantum optics)

Recently a parametric decay model was proposed in order to foresee LIPSS interspaces, and experimental results are in reasonable agreement. To confirm the possibility assumed by the model of pre-formed plasma generation, Ti surface was irradiated by a femtosecond (fs) laser beam composed by double fs pulses, with a fixed delay of 160 fs. The fluence of the first pulse (F-PP), responsible for surface plasma formation, was varied in the range 10-50 mJ cm(-2) and always kept below the LIPSS formation threshold fluence (F-LIPSS) of Ti for 50-single-shots exposure. The fluence of the delayed pulse (F-LP), responsible for LIPSS formation, was varied in the range 60-150 mJ cm(-2) and always kept above F-LIPSS. Regardless the specific fluence F-LP of the delayed pulse, the interspace of the grating structures increases with the increase of F-PP, that is the increase of the surface plasma density.
Trvalý link: http://hdl.handle.net/11104/0274344