techbeat writes: How would you react if a tiny hole in a piece of foil let through more light after you had covered it or dyed it a different colour? With the same surprise as the physicists who discovered that this is just what happens with very small holes and certain materials. Both findings could lead to light-based components for high-speed optical computers. The physicists suspect that plasmons from the gold disc blocking the hole are leaping up, grabbing the photons stuck on the other side and dragging them through. The photons then gush around the edges of the disc. In the case of the dyed foil, plasmons that can't interact with some wavelengths of light directly interact with the dye first, which then interacts with these photons — allowing more photons through the hole.