Laser terahertz emission microscopy of nanostructured spintronic emitters

被引：12

作者：

Li, Peiyan ^{[1
]}

Liu, Shaojie ^{[2
]}

Liu, Zheng ^{[3
]}

Li, Min ^{[3
]}

Xu, Hao ^{[4
]}

Xu, Yong ^{[5
,6
]}

Zeng, Heping ^{[3
,7
,8
]}

Wu, Xiaojun ^{[1
,2
]}

机构：

[1] Beihang Univ, Sch Elect & Informat Engn, Beijing 100191, Peoples R China

[2] Beihang Univ, Sch Cyber Sci & Technol, Beijing 100191, Peoples R China

[3] Univ Shanghai Sci & Technol, Engn Res Ctr Opt Instrument & Syst, Sch Opt Elect & Comp Engn, Shanghai Key Lab Modern Opt Syst,Minist Educ, Shanghai 200093, Peoples R China

[4] Natl Inst Metrol, Beijing 100029, Peoples R China

[5] Beihang Univ, Beijing Adv Innovat Ctr Big Data & Brain Comp, Sch Microelect, Beijing 100191, Peoples R China

[6] Beihang Univ, Hefei Innovat Res Inst, Hefei 230012, Peoples R China

[7] East China Normal Univ, State Key Lab Precis Spect, Shanghai 200062, Peoples R China

[8] East China Normal Univ, Chongqing Key Lab Precis Opt, Chongqing Inst, Chongqing 401120, Peoples R China

来源：

APPLIED PHYSICS LETTERS | 2022年 / 120卷 / 20期

基金：

中国国家自然科学基金; 国家重点研发计划;

关键词：

CONVERSION;

D O I：

10.1063/5.0080397

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Laser terahertz (THz) emission spectroscopy has broken the diffraction limit of THz frequencies and offers multifaceted spectroscopic and imaging capabilities for understanding the light-matter interaction in various quantum and energy materials. However, this advanced technique has not yet been applied in the recently extensively studied spintronic THz emission process, in which the material surface morphology may play an important role. Here, we conduct THz emission microscopy on 5.4-nm thick Pt/CoFeB/W heterostructures and obtain twice enhanced THz by tightly focusing the pumping laser, delicately choosing the radiation location on nanofilms and coating gold nanorods. Through THz emission mapping, the material surface morphology and its modification have a strong correlation with THz emission performance from spintronic emitters. Our proposed femtosecond fiber laser driven spintronic THz emission microscopy can provide exciting possibilities for studying surface morphology sensitive THz emission materials and microdomain ultrafast dynamics for low-dimensional small samples via further coupling optical microscopy.& nbsp;Published under an exclusive license by AIP Publishing.

引用

页数：6

共 27 条

[1] Ultrafast Photo-Thermal Switching of Terahertz Spin Currents [J].

Agarwal, Piyush ;

Medwal, Rohit ;

Kumar, Abhishek ;

Asada, Hironori ;

Fukuma, Yasuhiro ;

Rawat, Rajdeep Singh ;

Battiato, Marco ;

Singh, Ranjan .

ADVANCED FUNCTIONAL MATERIALS, 2021, 31 (17)

[2] Significant performance enhancement in photoconductive terahertz optoelectronics by incorporating plasmonic contact electrodes [J].

Berry, C. W. ;

Wang, N. ;

Hashemi, M. R. ;

Unlu, M. ;

Jarrahi, M. .

NATURE COMMUNICATIONS, 2013, 4

[3] THz-Driven Ultrafast Spin-Lattice Scattering in Amorphous Metallic Ferromagnets [J].

Bonetti, S. ;

Hoffmann, M. C. ;

Sher, M. -J. ;

Chen, Z. ;

Yang, S. -H. ;

Samant, M. G. ;

Parkin, S. S. P. ;

Durr, H. A. .

PHYSICAL REVIEW LETTERS, 2016, 117 (08)

[4] Efficient Generation and Arbitrary Manipulation of Chiral Terahertz Waves Emitted from Bi2Te3-Fe Heterostructures [J].

Chen, Xinhou ;

Wang, Hangtian ;

Wang, Chun ;

Ouyang, Chen ;

Wei, Gaoshuai ;

Nie, Tianxiao ;

Zhao, Weisheng ;

Miao, Jungang ;

Li, Yutong ;

Wang, Li ;

Wu, Xiaojun .

ADVANCED PHOTONICS RESEARCH, 2021, 2 (04)

[5] Generation and manipulation of chiral broadband terahertz waves from cascade spintronic terahertz emitters [J].

Chen, Xinhou ;

Wu, Xiaojun ;

Shan, Shengyu ;

Guo, Fengwei ;

Kong, Deyin ;

Wang, Chun ;

Nie, Tianxiao ;

Pandey, Chandan ;

Wen, Lianggong ;

Zhao, Weisheng ;

Ruan, Cunjun ;

Miao, Jungang ;

Li, Yutong ;

Wang, Li .

APPLIED PHYSICS LETTERS, 2019, 115 (22)

[6] All-Optical Manipulation of Magnetization in Ferromagnetic Thin Films Enhanced by Plasmonic Resonances [J].

Cheng, Feng ;

Wang, Chuangtang ;

Su, Zhaoxian ;

Wang, Xinjun ;

Cai, Ziqiang ;

Sun, Nian X. ;

Liu, Yongmin .

NANO LETTERS, 2020, 20 (09) :6437-6443

[7] Chiral terahertz wave emission from the Weyl semimetal TaAs [J].

Gao, Y. ;

Kaushik, S. ;

Philip, E. J. ;

Li, Z. ;

Qin, Y. ;

Liu, Y. P. ;

Zhang, W. L. ;

Su, Y. L. ;

Chen, X. ;

Weng, H. ;

Kharzeev, D. E. ;

Liu, M. K. ;

Qi, J. .

NATURE COMMUNICATIONS, 2020, 11 (01)

[8] Terahertz Spin-to-Charge Conversion by Interfacial Skew Scattering in Metallic Bilayers [J].

Gueckstock, Oliver ;

Nadvornik, Lukas ;

Gradhand, Martin ;

Seifert, Tom Sebastian ;

Bierhance, Genaro ;

Rouzegar, Reza ;

Wolf, Martin ;

Vafaee, Mehran ;

Cramer, Joel ;

Syskaki, Maria Andromachi ;

Woltersdorf, Georg ;

Mertig, Ingrid ;

Jakob, Gerhard ;

Klaeui, Mathias ;

Kampfrath, Tobias .

ADVANCED MATERIALS, 2021, 33 (09)

[9]

Huisman TJ, 2016, NAT NANOTECHNOL, V11, P455, DOI [10.1038/NNANO.2015.331, 10.1038/nnano.2015.331]

[10] Characterization of through-silicon vias using laser terahertz emission microscopy [J].

Jacobs, Kristof J. P. ;

Murakami, Hironaru ;

Murakami, Fumikazu ;

Serita, Kazunori ;

Beyne, Eric ;

Tonouchi, Masayoshi .

NATURE ELECTRONICS, 2021, 4 (03) :202-207

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