Pak Him Chow



Sorry for being unclear, what I have done was replacing the original spheres with trangles, placing them together with the tips of both trangles distancing 5-10 nm. I was expecting that strong local enhencement would take place around the both tips that are close to each other, but as you can see from the electric field intensity plot, it only happens around the other tips.

I have tried changing the dimensions of the trangles, distance between the tips, material of the trangles, switching to radial source, nothing changes. What can I do in order to see strong local enhencement around the tips where they are close to each other? The reason I want to achieve this is because ultimately I want to place a sphere in between the trangle tips to act as a quantum dot and see the local enhencement occuring around the quantum dot.