title: Extraordinary anisotropy of ultrafast laser writing in glass.
abstract: The unusual dependence of femtosecond laser writing on the light polarization and direction of raster scanning is demonstrated in silica and chalcogenide glasses. Two different mechanisms contributing to the observed anisotropy are identified: the chevron-shaped stress induced by the sample movement and the pulse front tilt of ultrashort light pulse. Control of anisotropies associated with the spatio-temporal asymmetry of an ultrashort pulse beam and scanning geometry is crucial in the ultrafast laser machining of transparent materials.
authors.affiliation: Optoelectronics Research Centre, University of Southampton, SO17 1BJ, UK. mg2e10@orc.soton.ac.uk
authors.forename: Mindaugas
authors.initials: M
authors.lastname: Gecevičius
authors.forename: Martynas
authors.initials: M
authors.lastname: Beresna
authors.forename: Jingyu
authors.initials: J
authors.lastname: Zhang
authors.forename: Weijia
authors.initials: W
authors.lastname: Yang
authors.forename: Hiromichi
authors.initials: H
authors.lastname: Takebe
authors.forename: Peter G
authors.initials: PG
authors.lastname: Kazansky
mesh_terms: D016880:Anisotropy; D005898:Glass / Q000737:chemistry* / Q000528:radiation effects*; D007834:Lasers; D013499:Surface Properties / Q000528:radiation effects