title: Linear focusing by a plane grating with curved grooves.
abstract: We study the field diffracted by a plane grating with curved (parabolic) grooves. We will demonstrate that when a monochromatic plane wave is incident on a grating with parabolic grooves the diffracted field has a focal line whose position depends on the curvature radius of the parabolas and the incidence angle of the light onto the grating. The effect described has potential applications in grating-based devices for focusing light without requiring any additional optics.
authors.affiliation: Instituto de Física, Facultad de Ingeniería, J Herrera y Reissig 565, 11300 Montevideo, Uruguay. jferrari@fing.edu.uy
authors.forename: José A
authors.initials: JA
authors.lastname: Ferrari
authors.forename: Eugenio
authors.initials: E
authors.lastname: Garbusi
authors.forename: Erna M
authors.initials: EM
authors.lastname: Frins