Abstract: A spatial filtering device with narrow angular passband, characterized in that it comprises a photonic structure consisting of cylindrical elements distributed in the form of successive layers stacked along an axis Oz in a dielectric medium or in a vacuum, all the cylindrical elements being identical except for cylindrical elements of at least one layer consisting of cylindrical elements having a substantially smaller cross-sectional surface area than the cross-sectional area of the cylindrical elements of the layers surrounding it.

Abstract: A bolometric detection device for millimeter or sub-millimeter waves and a method for manufacturing this device. According to the invention, at least one bolometer (8) is formed on a support (6) which is transparent to the waves to be detected, each bolometer including a reflecting resonant cavity (10), a grid (12) thermally insulated from the support and positioned above the cavity, regular conductor patterns (14) which are formed on the grid and whose electrical impedance is matched to that of the void, and a thermometer (16) integral with the grid.