A5106636839- Advanced Electron Microscopy Techniques and Applications
- X-ray Spectroscopy and Fluorescence Analysis
- Magnetic properties of thin films
- Advanced X-ray Imaging Techniques
- Force Microscopy Techniques and Applications
Massachusetts Institute of Technology
2024
Abstract Transient grating spectroscopy is a specialized application of the four-wave-mixing methodology and constitutes versatile technique for investigating dynamics vibrational, magnetic electronic degrees freedom matter in background-free fashion. Recent developments free-electron laser sources have enabled extension this into extreme ultraviolet range. Ongoing efforts to expand transient x-ray regime promise numerous advantages: (1) substantial penetration depths that allow probing bulk...
The advent of free electron lasers has opened the opportunity to explore interactions between extreme ultraviolet (EUV) photons and collective excitations in solids. While EUV transient grating spectroscopy, a noncollinear four-wave mixing technique, already been applied probe coherent phonons, potential radiation for studying nanoscale spin waves not harnessed. Here we report experiments with magnons Fe/Gd ferrimagnetic multilayers. Magnons tens nanometers wavelengths are excited by pair...