- #1
Jeffrey Yang
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The complete Maxwell wave equation for electromagnetic field using the double curl operator "∇×∇×". Only when the transverse condition is hold, this operator can equal to the Laplace operator and form the helmholtz.
My question is what's the condition can we use the helmoltz equation instead of the double curl operator "∇×∇×" one.
If there is no charge (both the free and polarized one), then the electric field is transverse. So even in the piece-wise homogeneous system, we can still use the helmoltz equation in that medium. Is this correct? If this is true, that means once the dielectric function is abrupt changed, we can always use the helmholtz equation to solve the source free mode in one of the homogeneous region and then use the boundary condition to get the overall distribution of the system. Is this right?
So is there any other situation that we have to use the double curl operator "∇×∇×" one apart from the gradual change of the dielectric function?
Thanks a lot
My question is what's the condition can we use the helmoltz equation instead of the double curl operator "∇×∇×" one.
If there is no charge (both the free and polarized one), then the electric field is transverse. So even in the piece-wise homogeneous system, we can still use the helmoltz equation in that medium. Is this correct? If this is true, that means once the dielectric function is abrupt changed, we can always use the helmholtz equation to solve the source free mode in one of the homogeneous region and then use the boundary condition to get the overall distribution of the system. Is this right?
So is there any other situation that we have to use the double curl operator "∇×∇×" one apart from the gradual change of the dielectric function?
Thanks a lot