title: Periodic nanovoid structures via femtosecond laser irradiation.
abstract: We have observed periodically aligned nanovoid structures inside a conventional borosilicate glass induced by a single femtosecond (fs) laser beam for the first time, to our knowledge. The spherical voids of nanosized diameter were aligned spontaneously with a period along the propagation direction of the laser beam. The period, the number of voids, and the whole length of the aligned void structure were controlled by changing the laser power, the pulse number, and the position of the focal point.
authors.affiliation: Department of Material Chemistry, Graduate School of Engineering, Kyoto University, Nishikyo-ku, Kyoto 615-8510, Japan. kane@collon1.kuic.kyoto-u.ac.jp
authors.forename: Shingo
authors.initials: S
authors.lastname: Kanehira
authors.forename: Jinhai
authors.initials: J
authors.lastname: Si
authors.forename: Jianrong
authors.initials: J
authors.lastname: Qiu
authors.forename: Koji
authors.initials: K
authors.lastname: Fujita
authors.forename: Kazuyuki
authors.initials: K
authors.lastname: Hirao
mesh_terms: D003460:Crystallization / Q000379:methods*; D004307:Dose-Response Relationship, Radiation; D005898:Glass / Q000032:analysis / Q000737:chemistry* / Q000528:radiation effects*; D007834:Lasers; D008422:Materials Testing; D008968:Molecular Conformation; D049329:Nanostructures / Q000032:analysis / Q000737:chemistry* / Q000528:radiation effects* / Q000648:ultrastructure; D036103:Nanotechnology / Q000379:methods*; D010316:Particle Size; D016062:Porosity; D011829:Radiation Dosage