THz spintronic emitters with magnetoelectric control of the polarization and applications to polarimetry.

Nicolas Tiercelin; Geoffrey Lezier; Pierre Koleják; Jean-François Lampin; Kamil Postava; Mathias Vanwolleghem

doi:10.1117/12.2597306

1 August 2021 THz spintronic emitters with magnetoelectric control of the polarization and applications to polarimetry.

Nicolas Tiercelin, Geoffrey Lezier, Pierre Koleják, Jean-François Lampin, Kamil Postava, Mathias Vanwolleghem

Proceedings Volume 11805, Spintronics XIV; 118050O (2021) https://doi.org/10.1117/12.2597306
Event: SPIE Nanoscience + Engineering, 2021, San Diego, California, United States

Abstract

We present a scheme to achieve coherent polarization rotation without multipolar or rotating external magnetic bias nor complex cascaded emitters, by exploiting artificially engineered strong uniaxial anisotropy in intermetallic heterostructures of rare-earth and transition metals. By replacing the FM layer of the spintronic emitter with a carefully designed FeCo/TbCo2/FeCo heterostructure, we demonstrated Stoner-Wolfarth-like coherent rotation of the THz polarization only by a unipolar variation of the strength of the hard axis field. In a second step we demonstrated the magnetoelectric control of the polarization direction. These results improve greatly the feasibility of fast polarization switchable integrated THz sources impacting practical applications such as ultrabroadband THz spectroscopic ellipsometry without rotating elements, or polarization modulated high speed wireless data communications, but also fundamental physical studies into ultrafast terahertz optospintronics.

Conference Presentation

Citation Download Citation

Nicolas Tiercelin, Geoffrey Lezier, Pierre Koleják, Jean-François Lampin, Kamil Postava, and Mathias Vanwolleghem "THz spintronic emitters with magnetoelectric control of the polarization and applications to polarimetry.", Proc. SPIE 11805, Spintronics XIV, 118050O (1 August 2021); https://doi.org/10.1117/12.2597306

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