Vector-valued Lambertian fields and their sources

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dc.contributor Aalto-yliopisto fi
dc.contributor Aalto University en Blomstedt, Kasimir Setälä, Tero Tervo, Jani Hoenders, Bernhard J. Turunen, Jari Friberg, Ari T. 2018-08-08T10:02:06Z 2018-08-08T10:02:06Z 2016-05-09
dc.identifier.citation Blomstedt , K , Setälä , T , Tervo , J , Hoenders , B J , Turunen , J & Friberg , A T 2016 , ' Vector-valued Lambertian fields and their sources ' PHYSICAL REVIEW A , vol 93 , no. 5 , 053813 , pp. 1-10 . DOI: 10.1103/PhysRevA.93.053813 en
dc.identifier.issn 1050-2947
dc.identifier.issn 1094-1622
dc.identifier.other PURE UUID: 8bdb750c-d5a9-4d4c-a549-9e98fca632b5
dc.identifier.other PURE ITEMURL:
dc.identifier.other PURE LINK:
dc.identifier.other PURE FILEURL:
dc.description.abstract The electromagnetic field within an aperture in the wall of a blackbody cavity is a known example of a Lambertian source producing a far field which is unpolarized in all directions. In this work we show that in the electromagnetic context other Lambertian sources exist whose far fields, while obeying the cosine law for the radiant intensity, differ by their polarization states and degrees. For example, the far field may be azimuthally, radially, or circularly polarized, or the polarization state may vary depending on the direction. For specific Lambertian fields generated by quasihomogeneous sources it is possible to calculate explicitly the 3×3 electric cross-spectral density matrix of the nonevanescent part of the source. This enables one to assess the source's spatial coherence and partial polarization properties. In all cases, the coherence length turns out to be roughly half a wavelength, whereas the polarization characteristics of the sources may differ significantly. Our results could find uses, for instance, in radiometry and photometry, lighting applications, and remote sensing. en
dc.format.extent 1-10
dc.format.mimetype application/pdf
dc.language.iso en en
dc.relation.ispartofseries PHYSICAL REVIEW A en
dc.relation.ispartofseries Volume 93, issue 5 en
dc.rights openAccess en
dc.subject.other Atomic and Molecular Physics, and Optics en
dc.subject.other 114 Physical sciences en
dc.title Vector-valued Lambertian fields and their sources en
dc.type A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä fi
dc.description.version Peer reviewed en
dc.contributor.department Department of Applied Physics
dc.contributor.department University of Eastern Finland
dc.contributor.department University of Groningen
dc.subject.keyword Atomic and Molecular Physics, and Optics
dc.subject.keyword 114 Physical sciences
dc.identifier.urn URN:NBN:fi:aalto-201808084487
dc.identifier.doi 10.1103/PhysRevA.93.053813
dc.type.version publishedVersion

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