Patent ID: 7763854

Claim:
Optical detector, intended to detect at least one photon, this detector comprising: a dielectric substrate, having a refractive index n O , and a detecting element forming a serpentine, the detecting element being placed on the dielectric substrate and designed to generate an electric signal using the energy of the photon(s) received, this optical detector being characterised in that it further comprises a one-dimensional dielectric grating, including parallel lines, namely first lines that are made of a first dielectric material having a refractive index n H , and second lines that alternate with the first lines and that are made of a dielectric medium having a refractive index n B , the one-dimensional dielectric grating being placed above the detecting element, the set constituted by the one-dimensional dielectric grating and the detecting element presenting resonant absorption of the photon(s), at a given incidence and for a given polarisation of the photon(s), n H being greater than n O and n B , and a superstratum having a refractive index n i , this superstratum being placed above the one-dimensional dielectric grating, n H being furthermore greater than n i .