Reply To: DGTD band structure calculation

[Guilin Sun]

Just give you a quick reply that, this is more physics than simulation. Simulation obeys strictkly the math. Periodic BCs ensure the infinitely duplicated unit cells. When there is a defect, you will need to use larger perioridicity, and compare different periodicity and see if the result changes. If no change, it means the pertubaltion is local and you can use the smaller periodicity. I hope this helps you to consider it.