THz Emission from Spintronic Microstructure
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arXiv
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| Auteurs principaux: | , , , , , , , |
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| Format: | Preprint |
| Publié: |
2025
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| _version_ | 1866908336641802240 |
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| author | Ghaffari, Abbas Abdelsamei, Malek Thapa, Puja Mita, Seiji Collazo, Ramón Gundogdu, Kenan Sun, Dali Gu, Qing |
| author_facet | Ghaffari, Abbas Abdelsamei, Malek Thapa, Puja Mita, Seiji Collazo, Ramón Gundogdu, Kenan Sun, Dali Gu, Qing |
| contents | Recent advancements in spintronics have opened a new avenue in terahertz (THz) radiation sources that may outperform the traditional contact-based metallic counterparts. Inspired by the generation of broadband spintronic THz signals at the interface of a ferromagnet and ultrawide bandgap semiconductors, here we investigated the generation of THz radiation from micro-structured heterostructures of a metallic ferromagnet (Ni80Fe20) and an ultrawide bandgap semiconductor (AlGaN/GaN) that contains a layer of 2D electron gas. By precisely tailoring the dimension of the subwavelength pillars of a THz device, the micro-structured spintronic THz emitter can achieve up to more than three times higher emission intensity compared to that of the un-patterned counterpart. Our study advances the development of the next generation of spintronic THz sources that allow a tailored emission frequency and intensity control and, further, are compatible with existing integrated wide-bandgap semiconductor circuits. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2504_17579 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | THz Emission from Spintronic Microstructure Ghaffari, Abbas Abdelsamei, Malek Thapa, Puja Mita, Seiji Collazo, Ramón Gundogdu, Kenan Sun, Dali Gu, Qing Mesoscale and Nanoscale Physics Recent advancements in spintronics have opened a new avenue in terahertz (THz) radiation sources that may outperform the traditional contact-based metallic counterparts. Inspired by the generation of broadband spintronic THz signals at the interface of a ferromagnet and ultrawide bandgap semiconductors, here we investigated the generation of THz radiation from micro-structured heterostructures of a metallic ferromagnet (Ni80Fe20) and an ultrawide bandgap semiconductor (AlGaN/GaN) that contains a layer of 2D electron gas. By precisely tailoring the dimension of the subwavelength pillars of a THz device, the micro-structured spintronic THz emitter can achieve up to more than three times higher emission intensity compared to that of the un-patterned counterpart. Our study advances the development of the next generation of spintronic THz sources that allow a tailored emission frequency and intensity control and, further, are compatible with existing integrated wide-bandgap semiconductor circuits. |
| title | THz Emission from Spintronic Microstructure |
| topic | Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2504.17579 |