Signatures of relativistic spin-light coupling in magneto-optical pump-probe experiments

Mondal, Ritwik; Berritta, Marco; Oppeneer, Peter M.

Signatures of relativistic spin-light coupling in magneto-optical pump-probe experiments

Dateien

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Datum

2017

Autor:innen

Mondal, Ritwik

Berritta, Marco

Oppeneer, Peter M.

DOI (zitierfähiger Link)

https://doi.org/10.1088/1361-648X/aa68ea

Sammlungen

Physik

Publikationstyp

Zeitschriftenartikel

Publikationsstatus

Published

Erschienen in

Journal of Physics : Condensed Matter. 2017, 29(19), 194002. ISSN 0953-8984. eISSN 1361-648X. Available under: doi: 10.1088/1361-648X/aa68ea

Zusammenfassung

Femtosecond magneto-optical pump-probe measurements of ultrafast demagnetization show an intriguing difference in the first 100 fs of the magneto-optical Kerr response depending on whether the polarization of the pump and probe beams are in parallel or perpendicular configuration (Bigot et al 2009 Nat. Phys. 5 515). Starting from a most general relativistic Hamiltonian we focus on the ultra-relativistic light-spin interaction and show that this coupling term leads to different light-induced opto-magnetic fields when pump and probe polarization are parallel and perpendicular to each other, providing thus an explanation for the measurements. We also analyze other pump-probe configurations where the pump laser is circularly polarized and the employed probe contains only linearly polarized light and show that similar opto-magnetic effects can be anticipated.

Fachgebiet (DDC)

530 Physik

Zitieren

ISO 690

MONDAL, Ritwik, Marco BERRITTA, Peter M. OPPENEER, 2017. Signatures of relativistic spin-light coupling in magneto-optical pump-probe experiments. In: Journal of Physics : Condensed Matter. 2017, 29(19), 194002. ISSN 0953-8984. eISSN 1361-648X. Available under: doi: 10.1088/1361-648X/aa68ea

BibTex

@article{Mondal2017-05-17Signa-46181,
  year={2017},
  doi={10.1088/1361-648X/aa68ea},
  title={Signatures of relativistic spin-light coupling in magneto-optical pump-probe experiments},
  number={19},
  volume={29},
  issn={0953-8984},
  journal={Journal of Physics : Condensed Matter},
  author={Mondal, Ritwik and Berritta, Marco and Oppeneer, Peter M.},
  note={Article Number: 194002}
}

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