How to simulate the absorption efficiency of a layered structure?


#1

Hi everyone, I am new in Lumerical. I’m needing to simulate the absorption efficiency of a layered structure consisting of a metal layer over glass. I tried to do that as with the attached file scatteringITO.fsp (361.8 KB)
but results are not in agreement with the experimental ones in the figure

.

Thanks in advance.


#2

Hi,

I checked your file and I have a few suggestions:

  • You can use a plane wave source instead of TFSF source and set the x and y boundary conditions of the simulation region to periodic. Then the R and T monitors would give the total reflection and transmission.
  • For the theoretical result, is it for a layer of the metal on a semi-infinite glass substrate? If so, then you should extend the glass into the PML absorbing boundaries below, or else there will be reflections from the glass-air interface that would not occur in the theoretical case.
  • I noticed that some of the monitors were overlapping with the white shaded area around the source boundaries and this can lead to incorrect monitor results. This is discussed in more detail here:
    https://kb.lumerical.com/en/index.html?ref_sim_obj_how_close_can_monitors_be.html

The following example might be useful since it shows the method of calculating reflection, transmission and absorption:
https://kb.lumerical.com/en/index.html?solar_cells_motheye_antireflector.html