Mode conversion of a propagating to nonpropagating wave

A previous theory that gives a simple expression for the transmission coefficient through a mode conversion region, in terms of the local wave dispersion properties, is examined further in the special case where a propagating wave interacts with a localized resonant response. For this case it is shown how the theory can be derived, starting from Maxwell’s equations and the plasma conductivity tensor, and a particular example is analyzed by way of illustration.