Dear all ,

I am simulating a plasmonic solar cell using **gold triangular nanoprisms**, the triangle is equilateral with sides= **9nm** and prism’s height is **20nm**.

Here is my strcture:

**I want to calculate Scattering Cross Section, I used the cross section analysis group. + TFSF source on the whole array, I used linear wavelength spacing in the frequency monitor with 600 points (from 400nm to 1000nm wavelength)**

From the literature, **Only one peak** should appear( since the prism’s dimensions are smaller than 100nm) . (Link of paper attached in the end).

In my simulation I have one peak and small peaks at the right tail :

** I think this is the problem, the staircase causes many peaks in the simulation, but I can’t get rid of them!** (it will increase my simulation time tremendously )

**If anyone has simulated triangles before, do they have meshing problem because of staircasing?**

**Paper’s link:**

*" For nanoparticles with sizes down to the optical wavelength, the surface plasmon resonances*

*are clearly dipolar and can be satisfactorily described by the lowest order of the series of spherical*

*harmonics of Mie theory. For larger particles, typically in the 100 nm range, retardation*

*effects inside the plasmonic particles lead to the appearance of higher order multipolar plasmon*

*resonances that show off as new features in the optical spectra "*

Thank you