تقرير
Strategies to enhance THz harmonic generation combining multilayered, gated, and metamaterial-based architectures
| العنوان: | Strategies to enhance THz harmonic generation combining multilayered, gated, and metamaterial-based architectures |
|---|---|
| المؤلفون: | Maleki, Ali, Heindl, Moritz B., Xin, Yongbao, Boyd, Robert W., Herink, Georg, Ménard, Jean-Michel |
| سنة النشر: | 2024 |
| المجموعة: | Physics (Other) |
| مصطلحات موضوعية: | Physics - Optics, Physics - Applied Physics |
| الوصف: | 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 highlight the potential of engineered graphene-based samples in advancing THz frequency conversion technologies for signal processing and wireless communication applications. Comment: 13 pages (4 Figures) + 5 pages Supplementary Information (4 Figures) |
| نوع الوثيقة: | Working Paper |
| URL الوصول: | http://arxiv.org/abs/2405.17125 |
| رقم الأكسشن: | edsarx.2405.17125 |
| قاعدة البيانات: | arXiv |
| الوصف غير متاح. |