All optical control of magnetization in quantum confined ultrathin magnetic metals

Abstract All-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 F...

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Main Authors:	Saeedeh Mokarian Zanjani, Muhammad Tahir Naseem, Özgür Esat Müstecaplıoğlu, Mehmet Cengiz Onbaşlı
Format:	article
Language:	EN
Published:	Nature Portfolio 2021
Subjects:	Medicine R Science Q
Online Access:	https://doaj.org/article/74306c5f8fc74d9b8cea3ac02a026e37
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spelling	oai:doaj.org-article:74306c5f8fc74d9b8cea3ac02a026e372021-12-02T16:36:36ZAll optical control of magnetization in quantum confined ultrathin magnetic metals10.1038/s41598-021-95319-62045-2322https://doaj.org/article/74306c5f8fc74d9b8cea3ac02a026e372021-08-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-95319-6https://doaj.org/toc/2045-2322Abstract All-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.Saeedeh Mokarian ZanjaniMuhammad Tahir NaseemÖzgür Esat MüstecaplıoğluMehmet Cengiz OnbaşlıNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-10 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Saeedeh Mokarian Zanjani Muhammad Tahir Naseem Özgür Esat Müstecaplıoğlu Mehmet Cengiz Onbaşlı All optical control of magnetization in quantum confined ultrathin magnetic metals
description	Abstract All-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.
format	article
author	Saeedeh Mokarian Zanjani Muhammad Tahir Naseem Özgür Esat Müstecaplıoğlu Mehmet Cengiz Onbaşlı
author_facet	Saeedeh Mokarian Zanjani Muhammad Tahir Naseem Özgür Esat Müstecaplıoğlu Mehmet Cengiz Onbaşlı
author_sort	Saeedeh Mokarian Zanjani
title	All optical control of magnetization in quantum confined ultrathin magnetic metals
title_short	All optical control of magnetization in quantum confined ultrathin magnetic metals
title_full	All optical control of magnetization in quantum confined ultrathin magnetic metals
title_fullStr	All optical control of magnetization in quantum confined ultrathin magnetic metals
title_full_unstemmed	All optical control of magnetization in quantum confined ultrathin magnetic metals
title_sort	all optical control of magnetization in quantum confined ultrathin magnetic metals
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/74306c5f8fc74d9b8cea3ac02a026e37
work_keys_str_mv	AT saeedehmokarianzanjani allopticalcontrolofmagnetizationinquantumconfinedultrathinmagneticmetals AT muhammadtahirnaseem allopticalcontrolofmagnetizationinquantumconfinedultrathinmagneticmetals AT ozguresatmustecaplıoglu allopticalcontrolofmagnetizationinquantumconfinedultrathinmagneticmetals AT mehmetcengizonbaslı allopticalcontrolofmagnetizationinquantumconfinedultrathinmagneticmetals
_version_	1718383639779082240

All optical control of magnetization in quantum confined ultrathin magnetic metals

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