Photodetector with plasmon structure

摘要

The photodetector (10) has a metallic structure (16) placed on a doped semiconductor absorption layer (12) e.g. p-doped semiconductor layer. The structure forms a resonator of a surface plasmon mode with the absorption layer to concentrate incident electromagnetic radiation on the structure in field concentration zones of the absorption layer, where semiconductor zones (24) for collecting charge carriers are oppositely doped to the doping of the absorption layer. The semiconductor zones are formed in the layer and comprise topology that complements topology of the concentration zones.