Magnetization-induced optical rectification and inverse spin Hall effect for interfacial terahertz generation in metallic heterostructures
(2021) In Physical Review B 103(20).- Abstract
Metallic heterostructure as promising terahertz (THz) spintronic emitters has promoted the development of both spintronics and THz science. However, the underlying physics at the metallic interface, such as the nonlinear optical effect, remains unclear. Herein, we present interface magnetization induced THz generation from metallic heterostructure consisting of Heusler alloy CoFeMnSi (CFMS) and Pd thin films. THz generation is ascribed to 35% contribution from the magnetization-induced optical rectification (MOR) and 65% contribution from inverse spin Hall effect (ISHE) based on the pump polarization and sample azimuthal angle dependent measurement. Furthermore, the contribution ratio of the MOR decreases to 12% via lowering the CFMS... (More)
Metallic heterostructure as promising terahertz (THz) spintronic emitters has promoted the development of both spintronics and THz science. However, the underlying physics at the metallic interface, such as the nonlinear optical effect, remains unclear. Herein, we present interface magnetization induced THz generation from metallic heterostructure consisting of Heusler alloy CoFeMnSi (CFMS) and Pd thin films. THz generation is ascribed to 35% contribution from the magnetization-induced optical rectification (MOR) and 65% contribution from inverse spin Hall effect (ISHE) based on the pump polarization and sample azimuthal angle dependent measurement. Furthermore, the contribution ratio of the MOR decreases to 12% via lowering the CFMS grown temperature, which is due to the reduced crystalline quality and possible metal to semiconductor transformation in CFMS. Our results not only clarify MOR and ISHE in metallic heterostructure for the scientific field, but they also benefit THz source optimization for the technology field.
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- author
- Yao, Zehan LU ; Fu, Huarui ; Du, Wanyi ; Huang, Yuanyuan ; Lei, Zhen ; You, Caiyin and Xu, Xinlong
- organization
- publishing date
- 2021-05-19
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Physical Review B
- volume
- 103
- issue
- 20
- article number
- L201404
- publisher
- American Physical Society
- external identifiers
-
- scopus:85107078890
- ISSN
- 2469-9950
- DOI
- 10.1103/PhysRevB.103.L201404
- language
- English
- LU publication?
- yes
- id
- b16e4166-3cf7-48e7-95f8-5834dfb09537
- date added to LUP
- 2022-03-03 08:22:44
- date last changed
- 2023-11-21 03:23:04
@article{b16e4166-3cf7-48e7-95f8-5834dfb09537, abstract = {{<p>Metallic heterostructure as promising terahertz (THz) spintronic emitters has promoted the development of both spintronics and THz science. However, the underlying physics at the metallic interface, such as the nonlinear optical effect, remains unclear. Herein, we present interface magnetization induced THz generation from metallic heterostructure consisting of Heusler alloy CoFeMnSi (CFMS) and Pd thin films. THz generation is ascribed to 35% contribution from the magnetization-induced optical rectification (MOR) and 65% contribution from inverse spin Hall effect (ISHE) based on the pump polarization and sample azimuthal angle dependent measurement. Furthermore, the contribution ratio of the MOR decreases to 12% via lowering the CFMS grown temperature, which is due to the reduced crystalline quality and possible metal to semiconductor transformation in CFMS. Our results not only clarify MOR and ISHE in metallic heterostructure for the scientific field, but they also benefit THz source optimization for the technology field.</p>}}, author = {{Yao, Zehan and Fu, Huarui and Du, Wanyi and Huang, Yuanyuan and Lei, Zhen and You, Caiyin and Xu, Xinlong}}, issn = {{2469-9950}}, language = {{eng}}, month = {{05}}, number = {{20}}, publisher = {{American Physical Society}}, series = {{Physical Review B}}, title = {{Magnetization-induced optical rectification and inverse spin Hall effect for interfacial terahertz generation in metallic heterostructures}}, url = {{http://dx.doi.org/10.1103/PhysRevB.103.L201404}}, doi = {{10.1103/PhysRevB.103.L201404}}, volume = {{103}}, year = {{2021}}, }