News : Research

In research funded by the French National Research Agency (ANR), a team at Irig electrochemically functionalized silicon micropores. The very sensitive biosensors created in this way are suitable for use analyzing living cells. Their process, inspired by bipolar electrochemistry, involved placing two electrodes on either side of the pore. This technique usually requires voltages that […] >>

Leti presented an integrated vibration-energy harvesting circuit at ISSCC in San Francisco in February. The circuit, which is connected to the energy-harvester output, boasts never-before-seen levels of performance. It regulates the impedance at the input to the interface that optimizes the extraction yield (in excess of 95%). The circuit’s architecture boosts conversion yields (also in […] >>

Researchers at Irig collaborated with an international team to obtain dynamic coupling between two magnetic layers (yttrium iron garnet) separated by a gadolinium-gallium garnet substrate. These materials are all very good electrical insulators. The spin information can cross the substrate (which is neither magnetic nor electrically conductive) when the information is carried by chiral photons, […] >>

Leti and SYMME* developed a standout piezoelectric energy harvester. The researchers increased bandwidth by an impressive 446% and achieved near-state-of-the-art total efficiency of 94%. The device’s excellent performance can be attributed to a smart interface that dynamically tunes the resonance frequency to the environment’s vibration frequency. This allows the device to harvest energy beyond what […] >>

Researchers at Irig developed an ultra-fast magnetic tunnel junction (MTJ) that could be used to log events captured by stroboscopic photography. They used a terbium-cobalt layer whose magnetization can be switched using a femtosecond laser. A second magnetic layer is made from a material whose magnetization is not switchable. The magnetizations of these two layers […] >>