Dear everyone!
I have some question about the flux and EM field amplitude. I tried to
figure out the unit of third-order nonlinear susceptibility following the
instructions of wiki page. But I found that the flux obtained by flux-in-box
function is not equal to the product of E field amplitude and H field
amplitude. When I want to figure out the change of refractive index n in my
nonlinear system, should I use the flux in box or the E*H?
Thank you!
--
李志强
北京大学物理学院光学所
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