Coherent terahertz control of antiferromagnetic spin waves

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2010
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Nature Photonics. 2010, 5(1), pp. 31-34. ISSN 1749-4885. Available under: doi: 10.1038/nphoton.2010.259
Zusammenfassung

Ultrafast charge and spin excitations in the elusive terahertz regime of the electromagnetic spectrum play a pivotal role in condensed matter. The electric field of free-space terahertz pulses has provided a direct gateway to manipulating the motion of charges on the femtosecond timescale. Here, we complement this process by showing that the magnetic component of intense terahertz transients enables ultrafast control of the spin degree of freedom. Single-cycle terahertz pulses switch on and off coherent spin waves in antiferromagnetic NiO at frequencies as high as 1 THz. An optical probe pulse with a duration of 8 fs follows the terahertz-induced magnetic dynamics directly in the time domain and verifies that the terahertz field addresses spins selectively by means of the Zeeman interaction. This concept provides a universal ultrafast means to control previously inaccessible magnetic excitations in the electronic ground state.

Zusammenfassung in einer weiteren Sprache
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530 Physik
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Spectroscopy, Ultrafast photonics, Terahertz optics
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ISO 690KAMPFRATH, Tobias, Alexander SELL, Gregor KLATT, Alexej PASHKIN, Sebastian MÄHRLEIN, Thomas DEKORSY, Martin WOLF, Manfred FIEBIG, Alfred LEITENSTORFER, Rupert HUBER, 2010. Coherent terahertz control of antiferromagnetic spin waves. In: Nature Photonics. 2010, 5(1), pp. 31-34. ISSN 1749-4885. Available under: doi: 10.1038/nphoton.2010.259
BibTex
@article{Kampfrath2010Coher-14074,
  year={2010},
  doi={10.1038/nphoton.2010.259},
  title={Coherent terahertz control of antiferromagnetic spin waves},
  number={1},
  volume={5},
  issn={1749-4885},
  journal={Nature Photonics},
  pages={31--34},
  author={Kampfrath, Tobias and Sell, Alexander and Klatt, Gregor and Pashkin, Alexej and Mährlein, Sebastian and Dekorsy, Thomas and Wolf, Martin and Fiebig, Manfred and Leitenstorfer, Alfred and Huber, Rupert}
}
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