We’re putting the final touches on our new badges platform. Badge issuance remains temporarily paused, but all completions are being recorded and will be fulfilled once the platform is live. Thank you for your patience.

Ansys Learning Forum › Forums › Installation and Licensing › Ansys Products › Help in bandstructure simulation › Reply To: Help in bandstructure simulation

October 31, 2024 at 8:52 pm
Guilin Sun
Ansys Employee

 “updating slab modes” is just a reminder message. No worry about it.

"Gamma-X sweep from 0-1 " it sould be from 0 to 0.5 since it is folded.

I would suggest you to continue using 3D FDTD as 2D varFDTD might not be that accurate.

I guess there are some unwanted frequency points on the "bands". Usually it means the simulation time needs to be a little bit long. But it cannot be too long to reach autsohutoff min default value of 1e-5. Otherwise the bands will have some missing points.

You may need to use symmetry-type of BCs to separate TE/TM modes if the structure has some symmetry: https://optics.ansys.com/hc/en-us/articles/360034382694-Symmetric-and-anti-symmetric-BCs-in-FDTD-and-MODE 

Other factors please read this post: 

Ansys Insight: Why my simulation result is different from published paper or experiment?