How to generate a plane wave that is constant in time

[hfdihfd]

I understand that this generates a time-harmonic plane wave whose time dependence is $e^i\omega t$.

sources = [mp.Source(mp.ContinuousSource(frequency=frequency, is_integrated=True),
        component = mp.Ex,
        center=sourceLocation,
        size=sourceSize
        )]

Such a plane wave oscillates in time. I wonder if it is possible to generate a plane wave that is constant in time. That is, it can be expressed as a beam of light like the following:

[theogdoctorg]

Hello Hfdihfd, please forgive me if I am mis-understanding your question, but your statement seems unphysical ("a plane wave that is constant in time.") A time-invariant E- or M-field is by definition not a wave and becomes a statics problem, which would be more suited to a finite-element method (FEM) simulation approach rather than FDTD such as MEEP.
It may help for future requests if you are able to label your plots with axes (distance?) and a color legend. If the plot is showing a 2d plane with the color field intensity, it seems like you may be looking for a collimated beam, such as would be produced by a GaussianBeam source?
Admins, suggest marking issue as closed or remove.

[stevengj]

Yes, I agree that the question doesn't make sense.