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has been cited by the following article:

• TITLE: Thermal response and optical absorptance of metals under femtosecond laser irradiation

  AUTHORS: Anatoliy Y Vorobyev, Chunlei Guo

  KEYWORDS: Femtosecond Laser; Ablation; Residual Energy; Absorptance; Surface Structures

  JOURNAL NAME: Natural Science, Vol.3 No.6, June 22, 2011

  ABSTRACT: A detailed study on correlation between residual thermal response of a sample and its optical absorptance change due to laser-induced sur-face structural modifications in multi-shot fem-tosecond laser irradiation is performed. Ex-periments reveal 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, how-ever, both suppression and enhancement are seen in residual energy coupling although ab-sorptance is always enhanced. From these ob-servations, it appears that air plasma plays a dominant role in thermal coupling at a relatively low number of applied pulses, while the forma-tion of craters plays a dominant role at a high number of pulses.