title: Polarization-dependent ablation of silicon using tightly focused femtosecond laser vortex pulses.
abstract: We demonstrate experimentally that, in a tight focusing geometry, circularly polarized femtosecond laser vortex pulses ablate material differently depending on the handedness of light. This effect offers an additional degree of freedom to control the shape and size of laser-machined structures on a subwavelength scale.
authors.affiliation: Laser Physics Centre, The Australian National University, Canberra ACT 0200, Australia. chn111@physics.anu.edu.au
authors.forename: Cyril
authors.initials: C
authors.lastname: Hnatovsky
authors.forename: Vladlen G
authors.initials: VG
authors.lastname: Shvedov
authors.forename: Natalia
authors.initials: N
authors.lastname: Shostka
authors.forename: Andrei V
authors.initials: AV
authors.lastname: Rode
authors.forename: Wieslaw
authors.initials: W
authors.lastname: Krolikowski