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Journal Article

Ultrabroadband single-cycle terahertz pulses with peak fields of 300 kV cm-1 from a metallic spintronic emitter

MPS-Authors
http://pubman.mpdl.mpg.de/cone/persons/resource/persons84716

Seifert,  Tom
Physical Chemistry, Fritz Haber Institute, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons79062

Sajadi,  Mohsen
Physical Chemistry, Fritz Haber Institute, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons22250

Wolf,  Martin
Physical Chemistry, Fritz Haber Institute, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons21693

Kampfrath,  Tobias
Physical Chemistry, Fritz Haber Institute, Max Planck Society;

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Fulltext (public)

Manuscript_with_Proofs.pdf
(Any fulltext), 13MB

Supplementary Material (public)

SuppMat.pdf
(Supplementary material), 35KB

Citation

Seifert, T., Jaiswal, S., Sajadi, M., Jakob, G., Winnerl, S., Wolf, M., et al. (2017). Ultrabroadband single-cycle terahertz pulses with peak fields of 300 kV cm-1 from a metallic spintronic emitter. Applied Physics Letters, 110(25): 252402. doi:10.1063/1.4986755.


Cite as: http://hdl.handle.net/11858/00-001M-0000-002D-9A48-F
Abstract
We explore the capabilities of metallic spintronic thin-film stacks as a source of intense and broadband terahertz electromagnetic fields. For this purpose, we excite a W/CoFeB/Pt trilayer (thickness of 5.6 nm) on a large-area glass substrate (diameter of 7.5 cm) by a femtosecond laser pulse (energy 5.5 mJ, duration 40 fs, and wavelength 800 nm). After focusing, the emitted terahertz pulse is measured to have a duration of 230 fs, a peak field of 300 kV cm−1, and an energy of 5 nJ. In particular, the waveform exhibits a gapless spectrum extending from 1 to 10 THz at 10% of its amplitude maximum, thereby facilitating nonlinear control over matter in this difficult-to-reach frequency range on the sub-picosecond time scale.