Nonthermal Ultrafast Optical Control of Magnetization Dynamics by Linearly Polarized Light in Metallic Ferromagnet

被引：0

作者：

Shi, Jingyu ^{[1
,2
,3
]}

Zhao, Zirui ^{[1
,2
]}

Dai, Yu ^{[4
]}

He, Jiang ^{[1
,2
]}

Li, Tao ^{[1
,2
]}

Liang, En ^{[1
,2
]}

Wang, Jun ^{[1
,2
]}

Ni, Gang ^{[1
,2
]}

Sheng, Chuanxiang ^{[1
,2
]}

Wu, Di ^{[5
]}

Zhou, Shiming ^{[4
]}

Chen, Liangyao ^{[1
,2
]}

Zhao, Haibin ^{[1
,2
,6
]}

机构：

[1] Fudan Univ, Key Lab Micro & Nano Photon Struct, MOE, Shanghai 200433, Peoples R China

[2] Fudan Univ, Shanghai Ultraprecis Opt Mfg Engn Res Ctr, Dept Opt Sci & Engn, Shanghai 200433, Peoples R China

[3] Shaanxi Normal Univ, Basic Expt Teaching Ctr, Xian 710062, Peoples R China

[4] Tongji Univ, Sch Phys Sci & Engn, Shanghai 200092, Peoples R China

[5] Nanjing Univ, Dept Phys, Natl Lab Solid State Microstruct, Nanjing 210093, Peoples R China

[6] Fudan Univ, Inst Optoelect, Shanghai Frontiers Sci Res Base Intelligent Optoel, Shanghai 200433, Peoples R China

来源：

ADVANCED SCIENCE | 2023年 / 10卷 / 06期

基金：

中国国家自然科学基金;

关键词：

ferroelectric polarization; magnetization precession; metallic ferromagnet; optical rectification effect; ultrafast nonthermal effect;

D O I：

10.1002/advs.202205903

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Coherent optical control of the magnetization in ferromagnetic (FM) mediums using ultrafast nonthermal effect paves a promising avenue to improve the speed and repetition rate of the magnetization manipulation. Whereas previously, only heat-induced or helicity-dependent magnetization dynamics are demonstrated in metallic ferromagnets. Here, the linearly-polarized light control of magnetization is demonstrated in FM Co coupled with ferroelectric (FE) BiFeO3 by tuning the light polarization direction. It is revealed that in the Co/BiFeO3 heterostructure excited by femtosecond laser pulses, the magnetization precession amplitude follows a sinusoidal dependence on the laser polarization direction. This nonthermal control of coherent magnetization rotation is attributed to the optical rectification effect in the BiFeO3 layer, which yields a FE polarization depending on the light polarization, and the subsequent modulation of magnetic energy in Co by the electrostriction-induced strain. This work demonstrates an effective route to nonthermally manipulate the ultrafast magnetization dynamics in metallic ferromagnets.

引用

页数：9

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