uu.seUppsala University Publications
Change search
ReferencesLink to record
Permanent link

Direct link
Efficient metallic spintronic emitters of ultrabroadband terahertz radiation
Fritz Haber Inst Max Planck Soc, Dept Phys Chem, D-14195 Berlin, Germany..
Johannes Gutenberg Univ Mainz, Inst Phys, D-55128 Mainz, Germany.;Singulus Technol AG, D-63796 Kahl Am Main, Germany..
Ernst Moritz Arndt Univ Greifswald, Inst Phys, D-17489 Greifswald, Germany..
Univ Maryland Baltimore Cty, Dept Phys, Baltimore, MD 21250 USA..
Show others and affiliations
2016 (English)In: Nature Photonics, ISSN 1749-4885, E-ISSN 1749-4893, Vol. 10, no 7, 483-+ p.Article in journal (Refereed) PublishedText
Abstract [en]

Terahertz electromagnetic radiation is extremely useful for numerous applications, including imaging and spectroscopy. It is thus highly desirable to have an efficient table-top emitter covering the 1-30 THz window that is driven by a low-cost, low-power femtosecond laser oscillator. So far, all solid-state emitters solely exploit physics related to the electron charge and deliver emission spectra with substantial gaps. Here, we take advantage of the electron spin to realize a conceptually new terahertz source that relies on three tailored fundamental spintronic and photonic phenomena in magnetic metal multilayers: ultrafast photoinduced spin currents, the inverse spin-Hall effect and a broadband Fabry-Perot resonance. Guided by an analytical model, this spintronic route offers unique possibilities for systematic optimization. We find that a 5.8-nm-thick W/CoFeB/Pt trilayer generates ultrashort pulses fully covering the 1-30 THz range. Our novel source outperforms laser-oscillator-driven emitters such as ZnTe(110) crystals in terms of bandwidth, terahertz field amplitude, flexibility, scalability and cost.

Place, publisher, year, edition, pages
2016. Vol. 10, no 7, 483-+ p.
National Category
Atom and Molecular Physics and Optics
URN: urn:nbn:se:uu:diva-299854DOI: 10.1038/NPHOTON.2016.91ISI: 000378839600015OAI: oai:DiVA.org:uu-299854DiVA: diva2:950272
German Research Foundation (DFG), SFB TRR 173/Spin+XEU, European Research Council, 681917; 280879; 608031; 334324; 281043Swedish Research CouncilKnut and Alice Wallenberg Foundation
Available from: 2016-07-29 Created: 2016-07-28 Last updated: 2016-07-29Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full text

Search in DiVA

By author/editor
Maldonado, PabloOppeneer, Peter M.
By organisation
Materials Theory
In the same journal
Nature Photonics
Atom and Molecular Physics and Optics

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

Total: 56 hits
ReferencesLink to record
Permanent link

Direct link