Narrow-band tunable terahertz emission from ferrimagnetic Mn{sub 3-x}Ga thin films

Journal Article · Mon Jul 18 00:00:00 EDT 2016 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4958855· OSTI ID:22594468

Awari, N. ^[1]; Green, B.; Yildirim, O.; Lindner, J.; Fassbender, J.; Deac, A. M.; Gensch, M. ^[1]; Lau, Y. -C.; Betto, D.; Thiyagarajah, N.; Coey, J. M. D. ^[2]; Gallardo, R. A. ^[3]

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1. Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstr. 400, 01328 Dresden (Germany)
2. CRANN, AMBER and School of Physics, Trinity College Dublin, Dublin 2 (Ireland)
3. Departamento de Física, Universidad Técnica Federico Santa María, Avenida España 1680, 2390123 Valparíso (Chile)

Narrow-band terahertz emission from coherently excited spin precession in metallic ferrimagnetic Mn{sub 3-x}Ga 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.

• OSTI ID: 22594468
• Journal Information: Applied Physics Letters, Vol. 109, Issue 3; Other Information: (c) 2016 Author(s); Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
COMPARATIVE EVALUATIONS
EFFICIENCY
EMISSION
EMISSION SPECTROSCOPY
HEUSLER ALLOYS
LASERS
MAGNETIC PROPERTIES
PROBES
SPIN
THICKNESS
THIN FILMS