at Google ScholarTitle data
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.
Vol. 14
(2025)
.
- 44.
ISSN 2047-7538
DOI: https://doi.org/10.1038/s41377-024-01657-1
Abstract in another language
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.
Further data
| Item Type: | Article in a journal |
|---|---|
| Refereed: | Yes |
| Institutions of the University: | Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics > Professor Experimental Physics VIII - Ultrafast Dynamics > Professor Experimental Physics VIII - Ultrafast Dynamics - Univ.-Prof. Dr. Georg Herink Faculties Faculties > Faculty of Mathematics, Physics und Computer Science Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics > Professor Experimental Physics VIII - Ultrafast Dynamics |
| Result of work at the UBT: | Yes |
| DDC Subjects: | 500 Science > 530 Physics |
| Date Deposited: | 04 Dec 2024 11:38 |
| Last Modified: | 24 Jan 2025 09:28 |
| URI: | https://eref.uni-bayreuth.de/id/eprint/91316 |