Author:
Zanjani Saeedeh Mokarian,Naseem Muhammad Tahir,Müstecaplıoğlu Özgür Esat,Onbaşlı Mehmet Cengiz
Abstract
AbstractAll-optical control dynamics of magnetization in sub-10 nm metallic thin films are investigated, as these films with quantum confinement undergo unique interactions with femtosecond laser pulses. Our theoretical analysis based on the free electron model shows that the density of states at Fermi level (DOSF) and electron–phonon coupling coefficients (Gep) in ultrathin metals have very high sensitivity to film thickness within a few angstroms. We show that completely different magnetization dynamics characteristics emerge if DOSF and Gep depend on thickness compared with bulk metals. Our model suggests highly efficient energy transfer from femtosecond laser photons to spin waves due to minimal energy absorption by phonons. This sensitivity to the thickness and efficient energy transfer offers an opportunity to obtain ultrafast on-chip magnetization dynamics.
Funder
European Research Council
TÜBİTAK
Publisher
Springer Science and Business Media LLC
Cited by
5 articles.
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