surface plasmons (those that are either excited on the metallic surface or localized in a small metallic tip) also provide a method of overcoming the diffraction limit of light. The review article ...

The path of the electron beam may be varied so that the beam passes through one of the foils or misses both. The aluminum is polycrystalline so that the diffraction pattern consists of rings. The ...

The waves always 'spread' to some extent into the area beyond the gap. This is diffraction - the spreading out of waves when they go through a gap, or past the edge of a barrier. The extent of the ...

Captured here is a laser diffraction pattern, visible as a series of concentric circles with a bright central area. This pattern is a result of light waves spreading out and overlapping after passing ...