Narrow-band tunable terahertz emission from ferrimagnetic Mn3-xGa thin films

N. Awari, S. Kovalev, C. Fowley, K. Rode, R. A. Gallardo, Y. C. Lau, D. Betto, N. Thiyagarajah, B. Green, O. Yildirim, J. Lindner, J. Fassbender, J. M.D. Coey, A. M. Deac, M. Gensch

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26 Citations (Scopus)

Abstract

Narrow-band terahertz emission from coherently excited spin precession in metallic ferrimagnetic Mn3-xGa Heusler alloy nanofilms has been observed. The efficiency of the emission, per nanometer film thickness, is comparable or higher than that of classical laser-driven terahertz sources based on optical rectification. The center frequency of the emission from the films can be tuned precisely via the film composition in the range of 0.20-0.35 THz, making this type of metallic film a candidate for efficient on-chip terahertz emitters. Terahertz emission spectroscopy is furthermore shown to be a sensitive probe of magnetic properties of ultra-thin films.

Original languageEnglish
Article number032403
JournalApplied Physics Letters
Volume109
Issue number3
DOIs
Publication statusPublished - 2016 Jul 18
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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