Investigating Coherent Magnetization Control with Ultrashort THz Pulses - CNRS - Centre national de la recherche scientifique Accéder directement au contenu
Article Dans Une Revue Applied Sciences Année : 2022

Investigating Coherent Magnetization Control with Ultrashort THz Pulses

Grégory Malinowski

Résumé

Coherent terahertz control of magnetization dynamics is an area of current interest due to its great potential for the realization of magnetization control on ultrafast timescales in commercial devices. Here we report on an experiment realized at the THz beamline of the free electron laser FLASH at DESY which offers a tunable terahertz radiation source and spontaneously synchronized free-electron laser X-ray pulses to resonantly probe the magnetization state of a ferromagnetic film. In this proof-of-principle experiment, we have excited a thin Permalloy film at different THz wavelengths and recorded the induced magnetization dynamics with photons resonantly tuned to the Ni M2,3 absorption edge. For THz pump pulses including higher orders of the undulator source we observed demagnetization dynamics, which precise shape depended on the employed fundamental wavelength of the undulator source. Analyzing the shape in detail, we can reconstruct the temporal profile of the electric field of the THz pump pulse. This offers a new method for the realization of an in-situ terahertz beamline diagnostic which will help researchers to adjust the pulse characteristics as needed, for example, for future studies of THz induced coherent control of magnetization dynamics.
Fichier principal
Vignette du fichier
2022-Boris-applsci-12-01323.pdf (2.53 Mo) Télécharger le fichier
Origine : Fichiers éditeurs autorisés sur une archive ouverte

Dates et versions

hal-03764396 , version 1 (30-08-2022)

Licence

Paternité

Identifiants

Citer

Xuan Liu, Emmanuelle Jal, Renaud Delaunay, Romain Jarrier, Gheorghe Sorin Chiuzbaian, et al.. Investigating Coherent Magnetization Control with Ultrashort THz Pulses. Applied Sciences, 2022, 12 (3), pp.1323. ⟨10.3390/app12031323⟩. ⟨hal-03764396⟩
21 Consultations
25 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More