Polarization dynamics and polarization time of random three-dimensional electromagnetic fields
2010 (English)In: Physical Review A. Atomic, Molecular, and Optical Physics, ISSN 1050-2947, E-ISSN 1094-1622, Vol. 82, no 6, 063807- p.Article in journal (Refereed) Published
We investigate the polarization dynamics of random, stationary three-dimensional (3D) electromagnetic fields. For analyzing the time evolution of the instantaneous polarization state, two intensity-normalized polarization autocorrelation functions are introduced, one based on a geometric approach with the Poincare vectors and the other on energy considerations with the Jones vectors. Both approaches lead to the same conclusions on the rate and strength of the polarization dynamics and enable the definition of a polarization time over which the state of polarization remains essentially unchanged. For fields obeying Gaussian statistics, the two correlation functions are shown to be expressible in terms of quantities characterizing partial 3D polarization and electromagnetic coherence. The 3D degree of polarization is found to have the same meaning in the 3D polarization dynamics as the usual two-dimensional (2D) degree of polarization does with planar fields. The formalism is demonstrated with several examples, and it is expected to be useful in applications dealing with polarization fluctuations of 3D light.
Place, publisher, year, edition, pages
2010. Vol. 82, no 6, 063807- p.
Atom and Molecular Physics and Optics Telecommunications
IdentifiersURN: urn:nbn:se:kth:diva-30513DOI: 10.1103/PhysRevA.82.063807ISI: 000286731500009ScopusID: 2-s2.0-78650979534OAI: oai:DiVA.org:kth-30513DiVA: diva2:404050
QC 201103152011-03-152011-02-282011-03-15Bibliographically approved