caa a22 4500 463214676 CHVBK 20180405153152.0 cr unu---uuuuu 170326e20070201xx s 000 0 eng 10.1007/s00339-006-3751-5 doi (NATIONALLICENCE)springer-10.1007/s00339-006-3751-5 Shot-to-shot correlation of residual energy and optical absorptance in femtosecond laser ablation [Elektronische Daten] [A.Y. Vorobyev, Chunlei Guo] In this paper, we perform a shot-to-shot detailed study of how residual thermal energy correlates to the optical absorptance change due to laser-induced surface structural modifications in multi-shot femtosecond laser ablation. We observe an overall enhancement for residual thermal coupling and absorptance in air. Surprisingly, residual thermal coupling in air shows a non-monotonic dependence on pulse number and reaches a minimum value after a certain number of pulses, while these behaviors are not seen in absorptance. In vacuum, however, both suppression and enhancement are seen in residual energy coupling although absorptance is always enhanced. To explain these observations, we suggest that air plasma plays a dominant role in thermal coupling at a relatively low number of applied pulses, while the formation of a cavity plays a dominant role at a high number of pulses. Springer-Verlag, 2006 Vorobyev A.Y. The Institute of Optics, University of Rochester, 14627, Rochester, NY, USA aut Guo Chunlei The Institute of Optics, University of Rochester, 14627, Rochester, NY, USA aut Applied Physics A Springer-Verlag 86/2(2007-02-01), 235-241 0947-8396 86:2<235 2007 86 339 https://doi.org/10.1007/s00339-006-3751-5 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s00339-006-3751-5 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Vorobyev A.Y. The Institute of Optics, University of Rochester, 14627, Rochester, NY, USA aut NATIONALLICENCE 700 1- Guo Chunlei The Institute of Optics, University of Rochester, 14627, Rochester, NY, USA aut NATIONALLICENCE 773 0- Applied Physics A Springer-Verlag 86/2(2007-02-01), 235-241 0947-8396 86:2<235 2007 86 339 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer