Contact: Alex <alexei.maznev@gmail.com>
- Transient Gratings (TG) is a time-resolved four-wave mixing technique in which two short optical pump pulses are crossed in the sample to crfeate a spatially periodic excitation, whose dynamics is monitored via diffraction of a probe pulse (or a cw beam).
- We use the TG techniqe to study coherent phonons, thermal transport, ultrafast magnetism and more.
- A compact and efficient TG setup with optical heterodyning developed in the group has been replicated by many labs around the world.
- We also conduct experiments at free electron laser facilities such as FERMI in Trieste, where TG measurementrs in extreme ultraviolet and x-ray ranges have recently become possible.
(a) Schematic of transient grating experiment; (b) excitation pettern on the sample; (c) beams crossed in the sample in the transmission geometry; (d) FERMI free welectron laser (highlighted yellow) in Trieste, Italy, where we conduct transient grating experiments with extreme ultraviolet light (source: FELs of Europe )
Recent work:
