how to calculate band diagram of L1 triangular PC

[gell]

how to calculate simple band diagram

I have some questions when using Bandsolve to calculate projected band diagram of one single line defect triangular photonic crystal. First, I want to know what is the difference between triangular supercell and rectangular supercell. Secondly, If I choose rectangular supercell, how to set the basic vector? Rsoft didn't show such case in their tutorials. Could anyone help me to explain it? I also want to know how to get this projected band diagram by using plane expansion method. Thank a lot.

I attached the setting here.

 

[gell]

help, please. If possible, could anyone give me some general concept? Thanks.

 

[majidebnali2002]

your supercell should be selected as rectangular.

 

[lostinsocorro]

It might be a lot easier to use plane wave expansion method to calculate the band diagram for a triangular PC. You can find many codes available online.

When you are working with supercell method, you define a matrix of holes (with one at the center acting as a defect) as the basis function. With no defects, you are defining one hole as the basis function.

 

[optic]

Hi.I have same questions and also want to know how to get this projected band diagram by FDTD using RSOFT bandsolver.
I don't know how adjust FDTD bandsolver settings?Could anyone help me?
Thanks.