Journal
NATURE NANOTECHNOLOGY
Volume 11, Issue 5, Pages 455-+Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/NNANO.2015.331
Keywords
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Funding
- Foundation for Fundamental Research on Matter (FOM)
- European Union [280555, 281043, Norte-070124-FEDER-000070, FEDER-POCTI/0155]
- European Research Council [257280, 339813]
- 'Leading Scientist' programme of the Russian Ministry of Education and Science [14.Z50.31.0034]
- FCT [SFRH/BD/7939/2011]
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The idea to use not only the charge but also the spin of electrons in the operation of electronic devices has led to the development of spintronics, causing a revolution in how information is stored and processed. A novel advancement would be to develop ultrafast spintronics using femtosecond laser pulses. Employing terahertz (10(12) Hz) emission spectroscopy and exploiting the spin-orbit interaction, we demonstrate the optical generation of electric photocurrents in metallic ferromagnetic heterostructures at the femtosecond timescale. The direction of the photocurrent is controlled by the helicity of the circularly polarized light. These results open up new opportunities for realizing spintronics in the unprecedented terahertz regime and provide new insights in all-optical control of magnetism.
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