News : DOPT

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 […] >>

Neuromorphic networks for signal and information processing have acquired recently a renewed interest considering the more and more complex tasks that have to be solved automatically in current applications: speech recognition, dynamic image correlation, rapid decision processing integrating a plurality of information sources, behavior optimization, etc… Several types of neuromorphic networks do exist and, among […] >>

The focus today is on high luminance of the microdisplays to meet the requests for AR/VR application. The performance of current OLEDs, in terms of luminance and lifetime, especially for blue, have great difficulty in meeting these high luminance specdifications. Improvements in the efficiency and lifetime of the blue emitter are therefore mandatory. Fluorescent emissive […] >>