title: Sub-Diffraction Limited Writing based on Laser Induced Periodic Surface Structures (LIPSS).
abstract: Controlled fabrication of single and multiple nanostructures far below the diffraction limit using a method based on laser induced periodic surface structure (LIPSS) is presented. In typical LIPSS, multiple lines with a certain spatial periodicity, but often not well-aligned, were produced. In this work, well-controlled and aligned nanowires and nanogrooves with widths as small as 40 nm and 60 nm with desired orientation and length are fabricated. Moreover, single nanowire and nanogroove were fabricated based on the same mechanism for forming multiple, periodic structures. Combining numerical modeling and AFM/SEM analyses, it was found these nanostructures were formed through the interference between the incident laser radiation and the surface plasmons, the mechanism for forming LIPSS on a dielectric surface using a high power femtosecond laser. We expect that our method, in particular, the fabrication of single nanowires and nanogrooves could be a promising alternative for fabrication of nanoscale devices due to its simplicity, flexibility, and versatility.
authors.affiliation: School of Mechatronics Engineering, Harbin Institute of Technology, Harbin, Heilongjiang 150001, China.|School of Mechanical Engineering and Birck Nanotechnology Center, Purdue University, West Lafayette, IN 47907, USA.
authors.forename: Xiaolong
authors.initials: X
authors.lastname: He
authors.affiliation: School of Mechanical Engineering and Birck Nanotechnology Center, Purdue University, West Lafayette, IN 47907, USA.
authors.forename: Anurup
authors.initials: A
authors.lastname: Datta
authors.affiliation: School of Mechanical Engineering and Birck Nanotechnology Center, Purdue University, West Lafayette, IN 47907, USA.
authors.forename: Woongsik
authors.initials: W
authors.lastname: Nam
authors.affiliation: School of Mechanical Engineering and Birck Nanotechnology Center, Purdue University, West Lafayette, IN 47907, USA.
authors.forename: Luis M
authors.initials: LM
authors.lastname: Traverso
authors.affiliation: School of Mechanical Engineering and Birck Nanotechnology Center, Purdue University, West Lafayette, IN 47907, USA.
authors.forename: Xianfan
authors.initials: X
authors.lastname: Xu