Learning Forum

[arvind_007]

Dear all, I have to perform the simulation of a heterostructure in which one material is not present in the FDTD directory. How can I add the new material of known dielectric constant in the FDTD for simulation?

The new material I want to add is MoS2.

[kghaffari]

Hi Thanks for your question. To add a new material, open the material database in FDTD and click on "Add" and select the type of material you need so it is added to the material list. Find this new material and input the data you have. The video in this article also demonstrates this process.

[arvind_007]

Hello there I have checked the full video/course provided with the link. Almost half of the questions are answered in this course. However, I'd appreciate it if you could explain how to obtain the dielectric constant of MoS2 or provide a source for it. Also, could you please specify the type of materials for which the MoS2 will be chosen?
Thank you for your time.

[kghaffari]

Hi Great to know the resources were helpful to you.
If a material is not available in FDTD material database you would need to supply the optical properties yourself. The appropriate type depends on the material and its optical properties available to you. Detailed information about all the available material types is provided in this article.
Best regards

[arvind_007]

Hello Thank you for your prompt response to my query. I have learned how to add the sampled 3D data to the FDTD. However, the next thing I have to do is to perform the simulation on the heterostructure material. For simulating the two geometries/structures together, the simulation should proceed just like for a single geometry, i.e., including both the structures in the simulation region. Is it the correct way to simulate a heterostructure material?
Thank you for your time.
Best regards

[kghaffari]

Hi Yes, if you have two/several different materials you would need to define separate geometries and assign the corresponding materials to each of them. The FDTD simulation available in this article is an example of this were separate geometries are defined to account for silicon and germanium.
Best regards

[arvind_007]

Hi Excellent, and many thanks for your suggestions. This talk was quite beneficial in clearing my doubts.
Best regards