title: Three-dimensional temperature distribution and modification mechanism in glass during ultrafast laser irradiation at high repetition rates.
abstract: We experimentally determined the three-dimensional temperature distribution and modification mechanism in a soda-lime-silicate glass under irradiation of ultrafast laser pulses at high repetition rates by analyzing the relationship between the morphology of the modification and ambient temperature. In contrast to previous studies, we consider the temperature dependence of thermophysical properties and the nonlinear effect on the absorbed energy distribution along the beam propagation axis in carrying out analyses. The optical absorptivity evaluated with the temperature distribution is approximately 80% and at most 3.5% smaller than that evaluated by the transmission loss measurement. The temperature distribution and the strain distribution indicate that visco-elastic deformation and material flow play important roles in the laser-induced modification inside a glass.
authors.affiliation: Department of Material Chemistry, Graduate School of Engineering, Kyoto University, Kyoto, Japan.
authors.forename: Masahiro
authors.initials: M
authors.lastname: Shimizu
authors.forename: Masaaki
authors.initials: M
authors.lastname: Sakakura
authors.forename: Masatoshi
authors.initials: M
authors.lastname: Ohnishi
authors.forename: Masahiro
authors.initials: M
authors.lastname: Yamaji
authors.forename: Yasuhiko
authors.initials: Y
authors.lastname: Shimotsuma
authors.forename: Kazuyuki
authors.initials: K
authors.lastname: Hirao
authors.forename: Kiyotaka
authors.initials: K
authors.lastname: Miura
mesh_terms: D017610:Calcium Compounds / Q000737:chemistry; D005898:Glass / Q000737:chemistry*; D007834:Lasers; D008962:Models, Theoretical; D017711:Nonlinear Dynamics; D055095:Optics and Photonics / Q000295:instrumentation*; D010087:Oxides / Q000737:chemistry; D017640:Silicates / Q000737:chemistry; D012972:Sodium Hydroxide / Q000737:chemistry; D013696:Temperature; D013816:Thermodynamics; D055682:Viscoelastic Substances / Q000737:chemistry
chemical_list: D017610:Calcium Compounds; D010087:Oxides; D017640:Silicates; D055682:Viscoelastic Substances; C004569:soda lime; D012972:Sodium Hydroxide