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Parameters characterizing electromagnetic wave polarization

Carozzi¹, Karlsson, Bergman

¹Swedish Institute of Space Physics, Uppsala Division, SE-755 91 Uppsala, Sweden.

Physical Review. E, Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics

|October 25, 2000

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This study introduces generalized Stokes parameters for characterizing 3D electromagnetic fields. These new parameters, formulated in the frequency domain, extend polarization analysis to wide-band electromagnetic waves.

Area of Science:

Electromagnetism
Optics
Mathematical Physics

Background:

Traditional Stokes parameters are limited to quasi-monochromatic electromagnetic waves.
Characterizing 3D time-varying electromagnetic fields requires advanced polarization analysis tools.

Purpose of the Study:

To introduce generalizations of Stokes parameters for 3D time-varying electromagnetic fields.
To extend polarization analysis to wide-band electromagnetic waves using frequency-domain formulations.

Main Methods:

Expansion of the spectral density tensor in a basis of SU(3) symmetry group generators.
Identification of coefficients as generalized spectral density polarization parameters.
Formulation of polarization parameters in the frequency domain.

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Main Results:

Introduced generalized Stokes parameters and alternative characterizations for 3D time-varying electromagnetic fields.
Demonstrated that these parameters can describe spectral intensity and circular polarization.
Established a framework for analyzing wide-band electromagnetic waves, generalizing traditional methods.

Conclusions:

The generalized Stokes parameters offer a more comprehensive approach to characterizing electromagnetic fields.
The frequency-domain formulation enables the analysis of wide-band electromagnetic waves.
This work extends the applicability of polarization analysis beyond quasi-monochromatic assumptions.