Learning Forum

[Fatemeh Karami]

Hello,

 

I wanted to optimize a demultiplexer for an anisotropic material, similar to the example "Topology Optimization of a 4-channel wavelength demultiplexer 2D-TE" (https://optics.ansys.com/hc/en-us/articles/1500007188582-Topology-Optimization-of-a-4-channel-wavelength-demultiplexer-2D-TE). However, the problem is that when I use an anisotropic material (e.g., `eps_wg = Material(name='anisotropic material')`), I received some errors. I think the issue might be due to these two parts of the code:

 

```python

def runSim(params, eps_bg, eps_wg, x_pos, y_pos, size_x, size_y, filter_R, working_dir, beta):

    ######## DEFINE GEOMETRY ########

    geometry = TopologyOptimization2D(params=params, eps_min=eps_bg, eps_max=eps_wg, x=x_pos, y=y_pos, z=0, filter_R=filter_R, beta=beta)

```

I would appreciate if you could help me.

[Guilin Sun]

You will need to develop your own plugin/library in order to do this. there are some publications for this but may not be able directly to incorportate into Ansys FDTD without your efforts.