Ultrasensitive optical detector having a high temporal resolution and using a grating.

摘要

The detector has a unidimensional dielectric grating (34), whose one set of parallel lines (36) is made of a dielectric material having a refractive index and another set of parallel lines (38) is made of a perfect dielectric having another refractive index. The grating is placed above an ultra thin superconductive layer (32), where the grating and the layer have an absorption or photon resonance, under a normal incidence, for given polarization of photons. A superstratum (40) e.g. air, having a refractive index lower than that of the parallel lines (36) is placed above the grating.