title: Fractal photon sieve.
abstract: A novel focusing structure with fractal properties is presented. It is a photon sieve in which the pinholes are appropriately distributed over the zones of a fractal zone plate. The focusing properties of the fractal photon sieve are analyzed. The good performance of our proposal is demonstrated experimentally with a series of images obtained under white light illumination. It is shown that compared with a conventional photon sieve, the fractal photon sieve exhibits an extended depth of field and a reduced chromatic aberration.
authors.forename: Fernando
authors.initials: F
authors.lastname: Giménez
authors.forename: Juan A
authors.initials: JA
authors.lastname: Monsoriu
authors.forename: Walter D
authors.initials: WD
authors.lastname: Furlan
authors.forename: Amparo
authors.initials: A
authors.lastname: Pons