Collective Resonances in gold nanoparticles arrays
I’m trying to reproduce the results found in a paper to verify my OptiFDTD settings.
I entered the settings described Figure 4
Gold nanorods 123x85x35 (nm)
Pitch of the array 540 nm (between the centers)
Homogeneous index n=1.46
On my curves, the positions of the diffractive orders are correct (~560 nm for <1,1> and ~790 nm for <1,0>)
My curves show the coupling between the LSPR and the Rayleigh anomalies but it looks like the LSPR is strongly redshifted by 200 nm !
This is my first utilisation of FDTD and I can’t find the reason of this shift, if anyone could check the settings in my design, it would help me a lot.
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