Angular momentum of a strongly focussed Gaussian beam

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dc.creatorNieminen, Timo A.
dc.creatorHeckenberg, Norman R.
dc.creatorRubinsztein-Dunlop, Halina
dc.date2004-08-18
dc.date.accessioned2026-07-07T05:52:29Z
dc.date.available2026-07-07T05:52:29Z
dc.descriptionA circularly polarized rotationally symmetric paraxial laser beams carries hbar angular momentum per photon as spin. Focussing the beam with a rotationally symmetric lens cannot change this angular momentum flux, yet the focussed beam must have spin less than hbar per photon. The remainder of the original spin is converted to orbital angular momentum, manifesting itself as a longitudinal optical vortex at the focus. This demonstrates that optical orbital angular momentum can be generated by a rotationally symmetric optical system which preserves the total angular momentum of the beam.
dc.description4 pages, 3 figures
dc.identifierhttps://arxiv.org/abs/physics/0408080
dc.identifierhttp://arxiv.org/abs/physics/0408080
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/86337
dc.subjectOptics
dc.titleAngular momentum of a strongly focussed Gaussian beam
dc.typetext

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