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18 June 2024 Terahertz spintronic emission with planar antennas
Matthias Pacé, Oleksandr Kovalenko, José Solano, Michel Hehn, Mircea Vomir, Matthieu Bailleul
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Proceedings Volume PC12994, Terahertz Photonics III; PC1299408 (2024) https://doi.org/10.1117/12.3017052
Event: SPIE Photonics Europe, 2024, Strasbourg, France
Abstract
Spintronic THz emitters, consisting of Ta/Co/Pt trilayers patterned into rectangles of size 10 µm, have been integrated in planar electromagnetic antennas of various types (dipole, bow-tie, spiral). Antenna dimensions and shapes have been optimized with the help of electromagnetic simulations so as to maximize antenna efficiency in both narrow-band and broad-band geometries at/around 1 THz. The THz emission has been characterized using a pump-probe free space electro-optic sampling set-up, both for a single emitter geometry and for arrays of emitters. An increase of the detected THz signal is observed for all antenna geometries, with an enhancement ratio up to a factor of ten, together with changes of the emission bandwidth consistent with simulated characteristics.
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Matthias Pacé, Oleksandr Kovalenko, José Solano, Michel Hehn, Mircea Vomir, and Matthieu Bailleul "Terahertz spintronic emission with planar antennas", Proc. SPIE PC12994, Terahertz Photonics III, PC1299408 (18 June 2024); https://doi.org/10.1117/12.3017052
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KEYWORDS
Antennas
Spintronics
Terahertz radiation
Design and modelling
Femtosecond phenomena
Femtosecond pulse shaping
Metals
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