dispersion diagram of subwavelength grating waveguides
Hello everyone,
I am trying to simulate a subwavelength grating (SWG) waveguide (see attached figure).
My goal is to calculate:
- The effective index neff of the TE mode
- The group index ng
- Most importantly, the bandgap (dispersion diagram) properties of the waveguide, as shown in the attached figure
Unfortunately, I am not very familiar with this type of simulation, and I am unsure how to calculate these parameters for a waveguide whose structure varies along the propagation direction.
For conventional waveguides, I know that mode solvers can be used to calculate parameters such as neff and ng. However, for subwavelength grating waveguides, I am not sure what the correct approach is or which simulation methods/tools are typically used.
Any guidance, recommended methods, or references would be greatly appreciated.
Thanks in advance for your help!
u/Critical-Tower-1712 — 2 days ago