The geometrical description of electromagnetic radiation

M. D. Malykh, N. E. Nikolaev and L. A. Sevastianov

Journal of Electromagnetic Waves and Applications, 2016, vol. 30, issue 15, 2055-2066

Abstract: The paper describes the relationship between the solutions of Maxwell’s equations which can be considered at least locally as plane waves and the curvilinear coordinates of geometrical optics; it generalizes the results achieved by Lüneburg, concerning the evolution of surfaces of electromagnetic fields discontinuities. If vectors E→$ \vec{E} $ and H→$ \vec{H} $ are orthogonal to each other and their directions do not change with time t, but may vary from point to point in the domain G, then under some conditions there is an orthogonal coordinate system x1,x2,x3$ x_1,x_2,x_3 $ in which x1$ x_1 $-lines represent rays of geometrical optics, x2$ x_2 $-lines point out E→$ \vec{E} $-direction and, x3$ x_3 $-lines point out H→$ \vec{H} $-direction. This coordinate system will be called phase-ray coordinate system. In the article, it will be proved that field under study can be represented by two scalar functions. The article will also specify the necessary and sufficient conditions for the existence of a coordinate system, generated by the solution of Maxwell’s equations with the holonomic field of the Poynting vector. It is shown that the class of solutions of Maxwell’s equations, as described in this work, includes monochromatic polarized waves, and the Hilbert–Courant solutions and their generalizations.

Date: 2016
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DOI: 10.1080/09205071.2016.1240632

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