Plasmonic Ring
Hello,
I was trying to simulate a plasmonic ring resonator (MIM and IMI),
I use 2D simulation, and Lorentz-Drude model for metals,
but I faced 2 problems:
1 – Calculating the effective index, ‘mode not found’ appears a lot to me, and inconsistently, I mean, I’m not using cut-off wavelengths or guide width, but I get strange results like having symmetric and antisymmteric modes at lambda = 633 nm, then at lambda= 900, only antisymmetric, then at lambda = 1000 nm, symmetric and antisymmetric modes appear again!
2 – When I operate at a wavelength at which a mode exists, no matter how I increase the simulation time or decrease the mesh size or time step, I don’t get the resonance effect of the ring,
actually I’m not using my ring design, yet, I’m using already published designs so as yo make sure I’m operating OptiFDTD correctly, however, these previously done designs don’t seem to work with me in OptiFDTD.
So please,
Does OptiFDTD have any limitations when simulating plasmonics?
And how can I overcome the difficulties I’ve stated above?
Thanks a lot,
Noha
Responses (12):
Login You must be logged in to reply to this topic.