Photodetector element for infrared light radiation, and hotodetector including such a photodetector element

摘要

The present invention relates to a photodetector element (3) for an infrared light radiation of a given wavelength, comprising, in a medium (5) at least partially transparent to infrared light radiation to be detected: - a layer (7) of a partially absorbing the conductive state material -, - a periodic structure (9) placed at a distance in the near field of the layer (7) of material including - conductor and exciting the propagation modes parallel to this layer (7) of material including - driver of the light radiation to detect infrared. The photodetector further comprises an electrical contact perimeter (13) which surrounds the contour of the photodetector element (3) and extends perpendicularly relative to the planes defined by the layer (7) of material including - conductor and the periodic structure (9), which is in contact with said layer (7) of material including - driver, and which also forms an optical mirror in the case of modes excited by the periodic structure (9).