Narrow-band tunable terahertz emission from ferrimagnetic Mn3-xGa thin films
Narrow-band tunable terahertz emission from ferrimagnetic Mn3-xGa thin films
Awari, N.; Kovalev, S.; Fowley, C.; Rode, K.; Gallardo, R. A.; Lau, Y.-C.; Betto, D.; Thiyagarajah, N.; Green, B.; Yildrim, O.; Lindner, J.; Fassbender, J.; Coey, J. M. D.; Deac, A. M.; Gensch, M.
Narrow-band terahertz emission from coherently excited spin precession in metallic 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 making this type of metallic films a candidate for efficient on-chip terahertz emitters. Terahertz emission spectroscopy is potentially a sensitive probe of magnetic properties of ultra-thin films.
Keywords: THz emission; ferrimagnets; spin excitations
Involved research facilities
- Radiation Source ELBE DOI: 10.17815/jlsrf-2-58
Related publications
- DOI: 10.17815/jlsrf-2-58 is cited by this (Id 23677) publication
-
Applied Physics Letters 109(2016)3, 032403
DOI: 10.1063/1.4958855
Cited 41 times in Scopus
Permalink: https://www.hzdr.de/publications/Publ-23677