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Degree of polarization in near fields of thermal sources: Effects of surface waves
KTH, Superseded Departments, Microelectronics and Information Technology, IMIT.
2002 (English)In: Physical Review Letters, ISSN 0031-9007, E-ISSN 1079-7114, Vol. 88, no 12Article in journal (Refereed) Published
Abstract [en]

We introduce the concept of degree of polarization for electromagnetic near fields. The approach is based on the generalized Stokes parameters that appear as expansion coefficients of the 3 x 3 coherence matrix in terms of the Gell-Mann matrices. The formalism is applied to optical near fields of thermally fluctuating half-space sources with particular interest in fields that are strongly polarized owing to resonant surface plasmons or phonons. This novel method is particularly useful when assessing the full vectorial characteristics of random evanescent fields, e. g., for near-field spectroscopy and polarization microscopy.

Place, publisher, year, edition, pages
2002. Vol. 88, no 12
Keyword [en]
beams, parameters
Identifiers
URN: urn:nbn:se:kth:diva-21400DOI: 10.1103/PhysRevLett.88.123902ISI: 000174542000032OAI: oai:DiVA.org:kth-21400DiVA: diva2:340098
Note
QC 20100525Available from: 2010-08-10 Created: 2010-08-10 Last updated: 2017-12-12Bibliographically approved

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