Coherent-mode representation of a statistically homogeneous and isotropic electromagnetic field in spherical volume
2005 (English)In: Physical Review E. Statistical, Nonlinear, and Soft Matter Physics, ISSN 1063-651X, E-ISSN 1095-3787, Vol. 71, no 3Article in journal (Refereed) Published
It is known that statistically stationary, homogeneous, and isotropic source distributions generate, in an unbounded low-loss medium, an electromagnetic field whose electric cross-spectral density tensor is proportional to the imaginary part of the infinite-space Green tensor. Using the recently established electromagnetic theory of coherent modes, we construct, in a finite spherical volume, the coherent-mode representation of the random electromagnetic field having this property. The analysis covers the fundamental case of blackbody radiation but is valid more generally; since a thermal equilibrium condition is not invoked, the electromagnetic field may have any spectral distribution. Within the scalar theory of coherent modes, which has been available for more than two decades, the analogous formulation results in the first explicit three-dimensional coherent-mode representation.
Place, publisher, year, edition, pages
2005. Vol. 71, no 3
space-frequency domain, radiation, polarization, tensors
IdentifiersURN: urn:nbn:se:kth:diva-14717DOI: 10.1103/PhysRevE.71.036618ISI: 000228818200140ScopusID: 2-s2.0-45849155119OAI: oai:DiVA.org:kth-14717DiVA: diva2:332758
QC 201005252010-08-052010-08-05Bibliographically approved