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Can you give more details?
did you mean to do the fellowing two steps, and your problem was solved?
1. run "rslmd -install" in command line to install license server
2. set the environment variable "RSLM_SERVER" to "localhost"
you applied the Gaussian shape beam on the input plane with the help of TFSF technique, only fix the EM fields on that plane.
however, how narrow the beam will be is dependent on the background material and the centeral wavelength of laser source.
I think it is expect that the light enter would have idea kz=0. however the launched light source is a spot. it will have different incident angles. only those angles satisfy the TIR condition would propagate along the waveguide.
for idea 2D PC, we don't consider kz, because the Ez or Hz is...
considering that light propagating in the slab structure using the wave equation.
in the clad n0: (w*n0/c)^2=k0^2+kz^2, where k0 is the in plane vector, kz is the out of plane vector,
if k0>w*n0/c, kz is imaginary, and the z-vector is decay.
so it require that with the same w, k0 should choose...
some papers said that to use the dipole source to simulate the active layer, but to implement it in the FDTD code?
Moreover, how to evaluate how much energy have emitted from the chip?
Would experts give some advices?:?:
how to make fdtd codes run faster?
such as what kind of languages we choose, C, fortran or matlab.
the style the code writing. etc.
can anybody pose a guide line?
the nonlinear-FDTD codes reported is almost in form of
d(D)/dt=****
and then set electric field E=D/epsilon0/epsilonR, D:electric displacement
where epsilonR is related to Kerr effect or Raman effect
however for lossy material, d(D)/dt-sigmaE*E=***, sigmaE is the conductivity of material.
and...
fdtd for fiber bragg grating simulation
thank you for your information. but how to decide the weight coefficient between Raman scatter effet and Kerr effect.
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Thank you for your suggestion
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does anyone have 3rd Edition Taflove?
fdtd 2d matlab
if you are using the PML boundary. please check the interface of computational region and PML layers.
if you are using simple boundary condition, may be the magic step is not matched in case of dielectric background.
for free space case, the magic step is matched.
whatever the definition of Gaussian Beam is, What I only concern is only at the interface of scattered field and total field.
in fact, I want to whether there is a limit to use Gaussian beam in TFSF interface?
fdtd nonlinear optics
I think PML and UPML can handle inhomogeneous medium as well, by normalizing epsilon by the relative permittivity [ 2nd-FDTD book Toflove, page304, eq.7.52]
fdtd nonlinear 2008
that is nice of you.
btw, should the nonlinear code also run in the region of PML?
Added after 19 minutes:
in nonlinear medium, how to calculate the time-averaged Poynting vector?
as the power related to local index of refraction.
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