Référence projet : 10-EQPX-0052
RST : Valérie HALTE
Etablissement Coordinateur : CNRS Alsace (Strasbourg)
Région du projet : Grand Est
Discipline : 2 - SMI
Aide de l'ANR 10 989 900 euros
Investissement couvrant la période de février 2011 à décembre 2019
The project UNION is dedicated to the study of the states of matter coupled with photons, with an emphasis on two important aspects. On one hand the dynamics of magnetization in nanostructures (IPCMS laboratory) is studied at the femtosecond time scale (Femtomagnetism) and, on the other hand, the possibility of creating hybrid light-matter states is explored (ISIS laboratory). These objectives open new perspectives for future technologies such as laser assisted information recording devices, magnetic sensors or the developments of molecular materials having specific functionalities. For example we have shown for the first time that we can improve the conductivity of organic materials which is an important bottleneck in molecular electronics. More recently, hybrid states of matter have been generated using molecular vibrations which in principle should lower the role of chemical bounds allowing for catalytic effects and opening the way to selective chemistry controlled by light (ISIS). The experiments performed at IPCMS have shown that one can control the magnetic behavior of magnetic thin films and nanoparticles at the time scale of the spin-orbit interaction which occurs within a few femtoseconds for ferromagnetic dielectrics and a few tens of femtoseconds for ferromagnetic metallic structures. Another major breakthrough concerns the demonstration of the control of magnetic materials using picosecond acoustic pulses generated by femtosecond optical pulses. This is extremely important in the fields of Spintronics and Magnonics. All these results (T2 task) have been made possible thanks to the instrumental developments carried in the T1 task, such as: performant Focused Ion Beam nanofabrication; the development of ultrafast laser techniques in the extreme VUV and soft X-rays; tunable visible and near IR magneto-optics; ultrafast magneto-acoustics; time resolved optical and magneto-optical microscopies with simultaneous sub-micron and femtosecond resolutions.
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