" For most THz applications, and especially for nonlinear spectroscopy, Gaussian-shaped beam profiles are desired in order to achieve localized, well-controlled high electric field values. However, we do not observe a Gaussian beam shape for our measurements in the focal plane, and instead achieve a much better experimental fit using a Lorentzian profile ."
Why does the beam shape at the focus is a Lorentz distribution rather than a Gaussian distribution? Why?
http://iopscience.iop.org/article/10.1088/1367-2630/15/7/075012/meta
Frederico Botelho da Costa
Have you found an explanation yet? I'm doing thesis work on a Terahertz imaging system and our 0.1THz source also produces a Lorentzian beam instead of a Gaussian one.
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