News : Photonics, Imaging and displays

CEA Leti has conceived a holographic printer as part of its development of optical components and systems for the field of Augmented Reality. This printer allows us to record micro-holograms that encode elementary angular functions. The current application of the printer concern the development of pixelated holograms recorded with phase and angular matching for the […] >>

In recent years, the infrared imaging market has trended towards pixel size reduction. Interpixel crosstalk is a major limitation of small pitch devices, as it reduces the image resolution via the degradation of the modulation transfer function. The aim of this thesis is to study and fabricate pixel-level microoptics capable of reducing the crosstalk. The […] >>

Emission imaging is a medical imaging modality using radiopharmaceuticals, enabling to retrieve functional information. It is highly specific and sensitive to very small concentrations of the tracer. However, current instruments like scintillation cameras measure only a small fraction of emitted photons. Positrons cameras are more sensitive but limited to beta+ emitters. Recent improvements in the […] >>

The thesis concerns the study, modeling and development of infrared detectors based on antennas and MIM (Metal-Insulator-Metal) nanodiodes in the range 8-12 µm. These devices will operate at room temperature and will be manufactured in the CEA-LETI clean room. The student began his thesis work with a theoretical study of the behavior of dielectric and […] >>

X-rays is the most widely used medical imaging modality for the detection of pathologies, the monitoring of their evolution and during certain surgical procedures. The objective of this thesis is to study a new semiconductor material based on perovskites for direct X-ray detection. A thesis is running since October 2022 at CEA on the development […] >>