Efficient terahertz wave generation of diabolo-shaped Fe/Pt spintronic antennas driven by a 780 nm pump beam

Autor:	Mary Clare Sison Escaño, Chiyaka Tachioka, Hideaki Kitahara, Dmitry S. Bulgarevich, Joselito Muldera, Garik Torosyan, Rene Beigang, Miezel Talara, Takashi Furuya, Valynn Katrine Mag-usara, Makoto Watanabe, Masahiko Tani, Qixin Guo, Makoto Nakajima
Rok vydání:	2021
Předmět:	Materials science Spintronics biology business.industry Terahertz radiation General Engineering General Physics and Astronomy Optoelectronics business biology.organism_classification Diabolo Beam (structure)
Zdroj:	Applied Physics Express. 14:042008
ISSN:	1882-0786 1882-0778
Popis:	We report on efficient terahertz (THz) wave generation of Fe/Pt diabolo-shaped spintronic antennas with different Pt thicknesses fabricated on MgO substrates. Compared with the antenna-free spintronic bilayer, ∼45% and ∼98% emission amplitude improvements were obtained when using the antennas with thin and thick Pt, respectively, as THz radiation sources. The improvement can be attributed to the enhanced outcoupling of THz radiation to free space and to the enhanced THz emission with the deposition of thicker Pt layer at the displacement current direction. Our results suggest that efficient spintronic radiation sources can be obtained with proper design of these THz emitters.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::ad8bf44cf987be59dfe8cc0321267035 https://doi.org/10.35848/1882-0786/abeea0 Zobrazit plný text záznamu