Increasing TeraHertz spintronic emission with planar antennas
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arXiv
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| Format: | Preprint |
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2024
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| _version_ | 1866913223214628864 |
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| author | Pacé, Matthias Kovalenko, Oleksandr Solano, José Hehn, Michel Bailleul, Matthieu Vomir, Mircea |
| author_facet | Pacé, Matthias Kovalenko, Oleksandr Solano, José Hehn, Michel Bailleul, Matthieu Vomir, Mircea |
| contents | Spintronic THz emitters, consisting of Ta/Co/Pt trilayers patterned into rectangles of lateral size in the 10 $μ$m range, 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 studied using a pump probe free space electro-optic sampling set up, both for a single emitter geometry and for arrays of emitters. Results show an increase of the detected THz signal for all antenna geometries, with enhancement ratios in the range of three to fifteen depending on antenna type and frequency range, together with changes of the emission bandwidth consistent with simulated characteristics. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2402_03089 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Increasing TeraHertz spintronic emission with planar antennas Pacé, Matthias Kovalenko, Oleksandr Solano, José Hehn, Michel Bailleul, Matthieu Vomir, Mircea Applied Physics Optics Spintronic THz emitters, consisting of Ta/Co/Pt trilayers patterned into rectangles of lateral size in the 10 $μ$m range, 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 studied using a pump probe free space electro-optic sampling set up, both for a single emitter geometry and for arrays of emitters. Results show an increase of the detected THz signal for all antenna geometries, with enhancement ratios in the range of three to fifteen depending on antenna type and frequency range, together with changes of the emission bandwidth consistent with simulated characteristics. |
| title | Increasing TeraHertz spintronic emission with planar antennas |
| topic | Applied Physics Optics |
| url | https://arxiv.org/abs/2402.03089 |