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

Seifert TS, Jaiswal S, Sajadi M, Jakob G, Winnerl S, Wolf M, Klaeui M, Kampfrath T (2017)

Publication Type: Journal article

Publication year: 2017

Journal

Applied Physics Letters American Institute of Physics (AIP)

Book Volume: 110

Article Number: 252402

Journal Issue: 25

DOI: 10.1063/1.4986755

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.

Involved external institutions

Fritz-Haber-Institut der Max-Planck-Gesellschaft (FHI) DE Germany (DE) Johannes Gutenberg-Universität Mainz (JGU) DE Germany (DE) Helmholtz-Zentrum Dresden-Rossendorf (HZDR) DE Germany (DE)

How to cite

APA:

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

MLA:

Seifert, Tom Sebastian, et al. "Ultrabroadband single-cycle terahertz pulses with peak fields of 300 kV cm-1 from a metallic spintronic emitter." Applied Physics Letters 110.25 (2017).

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