Abstract: A photodetector incorporates Fabry-Perot resonators that are coupled in order to concentrate radiation to be detected in a photoconductive material. It is then possible to use photoconductive nanocrystals that are deposited from a colloidal solution of the nanocrystals, while at the same time having a high photodetection sensitivity. It is thereby possible to form a matrix-array of such photodetectors on an image sensor readout circuit, while avoiding having to join a separate detection circuit to the readout circuit using intermediate solder balls. Additionally, each photodetector may be produced easily using deposition and selective removal processes, and may be able to be reconfigured so as to have variable detection sensitivity spectra.

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.