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Maleki, Ali ; Heindl, Moritz ; Xin, Yongbao ; Boyd, Robert W. ; Herink, Georg ; Ménard, Jean-Michel:
Strategies to enhance THz harmonic generation combining multilayered, gated, and metamaterial-based architectures.
In: Light: Science & Applications.
Bd. 14
(2025)
.
- 44.
ISSN 2047-7538
DOI: https://doi.org/10.1038/s41377-024-01657-1
Abstract
Graphene has unique properties paving the way for groundbreaking future applications. Its large optical nonlinearity and ease of integration in devices notably makes it an ideal candidate to become a key component for all-optical switching and frequency conversion applications. In the terahertz (THz) region, various approaches have been independently demonstrated to optimize the nonlinear effects in graphene, addressing a critical limitation arising from the atomically thin interaction length. Here, we demonstrate sample architectures that combine strategies to enhance THz nonlinearities in graphene-based structures. We achieve this by increasing the interaction length through a multilayered design, controlling carrier density with an electrical gate, and modulating the THz field spatial distribution with a metallic metasurface substrate. Our study specifically investigates third harmonic generation (THG) using a table-top high-field THz source. We measure THG enhancement factors exceeding thirty and propose architectures capable of achieving a two-order-of-magnitude increase. These findings underscore the potential of engineered graphene-based structures in advancing THz frequency conversion technologies for signal processing and wireless communication applications.
Weitere Angaben
| Publikationsform: | Artikel in einer Zeitschrift |
|---|---|
| Begutachteter Beitrag: | Ja |
| Institutionen der Universität: | Fakultäten > Fakultät für Mathematik, Physik und Informatik > Physikalisches Institut > Professur Experimentalphysik VIII - Ultraschnelle Dynamik > Professur Experimentalphysik VIII - Ultraschnelle Dynamik - Univ.-Prof. Dr. Georg Herink Fakultäten Fakultäten > Fakultät für Mathematik, Physik und Informatik Fakultäten > Fakultät für Mathematik, Physik und Informatik > Physikalisches Institut Fakultäten > Fakultät für Mathematik, Physik und Informatik > Physikalisches Institut > Professur Experimentalphysik VIII - Ultraschnelle Dynamik |
| Titel an der UBT entstanden: | Ja |
| Themengebiete aus DDC: | 500 Naturwissenschaften und Mathematik > 530 Physik |
| Eingestellt am: | 04 Dec 2024 11:38 |
| Letzte Änderung: | 24 Jan 2025 09:28 |
| URI: | https://eref.uni-bayreuth.de/id/eprint/91316 |