as best i can tell, you've set the dimension of your structure to 3, but
the size in the x and y directions to be a single pixel. This is, depending
on what you're trying to do, a somewhat odd situation, because you have no
absorbing boundary condition in the x-y plane, only for waves which are
Dear Cerjan, thank you for your kind help.
Now let me summarize my tests. Firstly, I decreased sigma to 1e-100. However
the electric field still grows fast to infinity. My test results show that
sigma=1e-120 made the calculation converge. But why sigma is required so small.
It does not make
Thank you for your kind help.
Actually, I have tried the strength parameter sigma as small as 1e-20. But the
field rises to infinity rapidly. sigma can be used to tune the gain, can't it?
--
发自我的网易邮箱平板适配版
在 2020-07-26 04:47:29，"Alexander Cerjan" 写道：
This is likely the physically
This is likely the physically expected behavior. If your gain is coupling
to a mode of your system whose loss rate is less than that of the rate of
stimulated emission, your system will begin to lase, i.e. the field will
begin to grow exponentially. In real, physical systems, this is then
I am trying to use dispersive complex epsilon to describe gain in my
calculation. The parameters for the epsilon is defined as follows.
freq_32 = 2# emission frequency (units of 2\pi c/a)
gamma_32 = 0.306# FWHM emission linewidth in sec^-1 (units of 2\pi c/a)
sigma_32 = 1e-4
5 matches
Mail list logo
