Mathematical Description of Elliptical Polarization
The classical sinusoidal plane wave solution of the electromagnetic wave equation for the electric and magnetic fields is (cgs units)
for the magnetic field, where k is the wavenumber,
is the angular frequency of the wave, and is the speed of light.
Here is the amplitude of the field and
is the Jones vector in the x-y plane. The axes of the ellipse have lengths and . If and are equal the wave is linearly polarized. If they differ by the wave is circularly polarized.
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