The PRobe far-Infrared Mission for Astrophysics (PRIMA) is an actively cooled, infrared observatory for the community for the next decade. On board, an infrared camera, PRIMAger, will provide observers with coverage of mid-infrared to far-infrared wavelengths from about 25 to 264 microns. PRIMAger will offer two imaging modes: the Hyperspectral mode will cover the 25-80 microns wavelength range with a resolution R~10 while the Polarimetric mode will have four broad-band filters, sensitive to polarization, from 80 to 264 microns. These capabilities have been specifically tailored to answer fundamental astrophysical questions such as black hole and star-formation coevolution in galaxies, the evolution of small dust grains over a wide range of redshifts, and the effects of interstellar magnetic fields in various environments, as well as opening a vast discovery space with versatile photometric and polarimetric capabilities.
InGaN/GaN µLEDs are a promising candidate to visible optical communication applications thanks to their high luminosity and high bandwidth. High data rate are reachable by using them as an array to realize parallel communication. To optimize their integration, we propose a CMOS compatible process to make the µLEDs directly on top of an ASIC and to use them as emitter and fast photodetector. We have demonstrated functional µLEDs on a 200mm silicon substrate and frequency characterization were performed for both emission and reception.
Multidrug-resistant bacteria stem from the massive use of non-specific antibiotics prescribed to manage bacterial infections. The therapeutic use of viruses called bacteriophages is a promising complementary and personalised strategy requiring very accurate phage selection for patient administration. Therefore, we are developing an interdisciplinary methodology for phage susceptibility testing (PST) based on bio-photonic microsystems. We demonstrated the use of on-chip optical photonic crystals on silicon-on-insulator (SOI) for the spatial confinement of bacteria and phages. We will present our state of the art of this project and the methods currently used to study the interactions between SOI and biological objects.
We present a diffraction-phase and fluorescence 3D microscope as novel bimodal imaging technique, which provides simultaneous phase and multi-color epi-fluorescence acquisitions of living multicellular samples. The instrument consists of an LED-array to acquire intensity images at different illumination angles and an epifluorescence setup for fluorescence excitation. The 3D sample's optical properties are reconstructed using the beam propagation method embedded inside a deep learning framework. To obtain the fluorescence reconstructions, we developed a novel incoherent model that takes into account the heterogeneous refractive indexes of the scattering sample. We validated the technique on long-term acquisitions of mouse embryos and 3D liver organoids under physiological conditions.
ROLLO, for Rank-Ouroboros, LAKE and LOCKER, was a candidate to the second round of the National Institute of Standards and Technology (NIST) Post-Quantum Cryptography (PQC) standardization process. In the lastest update in April 2020, there was a key-encapsulation mechanism (ROLLO-I) and a public-key encryption scheme (ROLLO-II). In this paper, we propose a side-channel attack to recover the syndrome during the decapsulation process of ROLLO-I. From this syndrome, we explain how to recover the private key. We target two constant-time implementations: the C reference implementation and a C implementation available on GitHub . By capturing power measurements during the execution of the Gaussian elimination function, we are able to extract from a single trace each element of the syndrome. This attack can also be applied to the decryption process of ROLLO-II. Finally, we give countermeasures based on masking and randomization to protect future implementations. We also provide their impact regarding the execution time.
