Modification of the amorphous carbon films by the ns-laser irradiation

作者：Grigonis Alfonsas; Marcinauskas Liutauras^*; Vinciunaite Vinga; Raciukaitis Gediminas

来源：Central European Journal of Physics, 2011, 9(5): 1344-1350.

DOI：10.2478/s11534-011-0037-0

• diamond-like carbon
• laser irradiation
• graphitization
• spallation

The effect of a nanosecond laser irradiation of thin (60 and 145 nm) amorphous, diamond-like carbon films deposited on Si substrate by an ion beam deposition (IBD) from pure acetylene and acetylene/hydrogen (1:2) gas mixture was analyzed in this work. The films were irradiated with the infrared (IR) and ultraviolet (UV) radiation of the nanosecond Nd:YAG lasers working at the first (1.16 eV) and the third (3.48 eV) harmonics, using a multi-shot regime. The IR laser irradiation stimulated a minor increase in the fraction of sp(2) bonds, causing a slight decrease in the hardness of the films and initiated SiC formation. Irradiation with the UV laser caused the formation of carbides and increased hydrogenization of the Si substrate and the fraction of sp(2) sites. Spalliation and ablation were observed at a higher energy density and with a large number of laser pulses per spot.

• 出版日期2011-10