Field and Wave Electromagnetics 2nd Edition by David Cheng

Exercise 64

For a source-free polarized medium where = 0, J = 0, µ= µ o , but where there is a volume density of polarization P, a single vector potential n. may be defined such that
H = j 0 X e. ) Express electric field intensity E in terms of e and P.
b) Show that n. satisfies the nonhomogeneous Helmholtz's equation

The quantity n. is known as the electric Hertz pot entia l.