Narrow band tunable spintronic THz emission from ferrimagnetic nano-films

Awari, Nilesh; Ilaykov, I.; Fowley, Ciaran; Rode, K.; Lau, Y.-C.; Betto, D.; Thiyagarajah, N.; Green, Bertram Windisch; Yildrim, O.; Lindner, Jürgen; Faßbender, Jürgen; Coey, M.; Deac, Alina Maria; Gensch, Michael; Kovalev, Sergey

Narrow band tunable spintronic THz emission from ferrimagnetic nano-films

Awari, N.; Ilaykov, I.; Fowley, C.; Rode, K.; Lau, Y.-C.; Betto, D.; Thiyagarajah, N.; Green, B. W.; Yildrim, O.; Lindner, J.; Faßbender, J.; Coey, M.; Deac, A. M.; Gensch, M.; Kovalev, S.

We report on narrow band THz emission from ferrimagnetic Mn3-xGa nano-films based. The emission originates from coherently excited spin precession. The central frequency of the emitted radiation is determined by the anisotropy field, while the bandwidth relates to Gilbert damping. It is shown how THz emission can be used for the characterization dynamical properties of ultra-thin magnetic films. We furthermore discuss the potential of these types of films as efficient on-chip spintronic THz emitter.
Keywords: Spintronics, THz emitter, nano-films.

Invited lecture (Conferences)
International Conference on Optics and Electro-Optics 2019, 19.-22.10.2019, Dehradun, India

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