Abstract: An electromagnetic radiation detector (1) comprises at least one antenna (2), a portion (3) which is absorbing in a spectral band of resonance of the antenna, and means for detecting the heating produced by the absorbing portion. The antenna concentrates an electric field of electromagnetic radiation (R) to be detected within an area of concentration of the field (ZC) where the absorbing portion is located. Such detector may be functional for detecting radiation within the infrared range or the terahertz range. It may be used to create a detector for detecting image points in a two-dimensional structure so as to form an image sensor.

Abstract: Disclosed is a spectral filter including a plurality of Fabry-Perot structures which are collectively carried by a support, and coupled together so as to produce a coupling resonance that is distinct from individual resonances of each of the Fabry-Perot structures. The coupling resonance may have a higher quality factor than the quality factors of the individual resonances. Each Fabry-Perot structure includes two portions of metal surfaces which are parallel to a face of the substrate, so that electromagnetic radiation wave components propagating within each Fabry-Perot structure, and which contribute to the coupling resonance, have a direction of propagation that is parallel to the face of the substrate.

Abstract: Disclosed is a spectral filter including a plurality of Fabry-Perot structures which are collectively carried by a support, and coupled together so as to produce a coupling resonance that is distinct from individual resonances of each of the Fabry-Perot structures. The coupling resonance may have a higher quality factor than the quality factors of the individual resonances. Each Fabry-Perot structure includes two portions of metal surfaces which are parallel to a face of the substrate, so that electromagnetic radiation wave components propagating within each Fabry-Perot structure, and which contribute to the coupling resonance, have a direction of propagation that is parallel to the face of the substrate.