Dependence of femtosecond laser ablation for organic molecules on chosen substrate

Femtosecond laser ablation of organic molecules has been investigated to develop an elemental analysis technique for these samples. Behaviour of Sm⁺ emitted from organic molecules settled on chosen substrates was studied by the two-dimensional laser induced fluorescence method. Comparisons among substrates of a quartz glass, Si and Ta are presented with the parameters of a kinetic energy and a spreading velocity of Sm⁺. The kinetic energy of Sm⁺ emitted from the sample on the quartz glass was the highest and decreased for the Si and Ta. Moreover, it is found that the spatial distribution of Sm⁺ on the Si substrate tends to barely spread in the transverse direction. We observed that the ablation dynamics of the organic molecules on the substrate are affected by the substrate material.