title: White light propagation invariant beams.
abstract: Propagation invariant light fields such as Bessel light beams are of interest in a variety of current areas such as micromanipulation of atoms and mesoscopic particles, laser plasmas, and the study of optical angular momentum. Considering the optical fields as a superposition of conical waves, we discuss how the coherence properties of light play a key role in their formation. As an example, we show that Bessel beams can be created from temporally incoherent broadband light sources including a halogen bulb. By using a supercontinuum source we elucidate how the beam behaves as a function of bandwidth of the incident light field.
authors.forename: Pascal
authors.initials: P
authors.lastname: Fischer
authors.forename: C
authors.initials: C
authors.lastname: Brown
authors.forename: J
authors.initials: J
authors.lastname: Morris
authors.forename: C
authors.initials: C
authors.lastname: López-Mariscal
authors.forename: E
authors.initials: E
authors.lastname: Wright
authors.forename: W
authors.initials: W
authors.lastname: Sibbett
authors.forename: K
authors.initials: K
authors.lastname: Dholakia