https://www.spintec.fr/master-thesis-projects-for-spring-2026/
Context
There has been an increasing realization in recent decades of the fundamental importance of the angular momentum (AM) carried by wave fields, which can be separated into spin (SAM) and orbital (OAM) components in certain cases. The latter is a universal feature of waves in uniform continuum media represented by helical or rotational wavefronts, and can potentially encode a large amount of information for mode multiplexed communication channels or multi-level registers of quantum states. Theoretical and experimental investigations of wave AM are already well developed for electromagnetic waves, plasma waves, fluid waves or elastic waves. In recent years, experiments have found AM transfer between spin-waves (SWs) and optical vortices, or elastic waves. Most of these works, however, focused on SAM of SWs, leaving their OAM experimentally unresolved. During this internship, we propose to study the experimental evidence for non-zero magnon orbital angular momentum inside magnetic disk, by resolving the frequency splitting between magnon modes with counter-rotating wavefronts.
Work program & Skills acquired during internship
The work program will consist of i) performing magnetic resonance experiments using a home-built spectrometer on nanolithographically prepared magnetic microdisks and ii) comparing the spectra with finite element simulations. The skills required are a basic knowledge of solid state physics and an interest in experimental developments. The skills that will be acquired during this training are microwave technology, magnetic resonance, and finite element simulations. The project will lead to a Ph.D. thesis.
- Requested background: Master 2
- Duration: 4-6 months
- Start period: Feb/ March 2026
- Possibility of PhD thesis : YES