| Autor: |
Peters Luke, Rocco Davide, Olivieri Luana, Leon Unai Arregui, Cecconi Vittorio, Carletti Luca, Gigli Carlo, Valle Giuseppe Della, Cutrona Antonio, Gongora Juan Sebastian Totero, Leo Giuseppe, Pasquazi Alessia, De Angelis Costantino, Peccianti Marco |
| Jazyk: |
angličtina |
| Rok vydání: |
2024 |
| Předmět: |
|
| Zdroj: |
EPJ Web of Conferences, Vol 309, p 08008 (2024) |
| Druh dokumentu: |
article |
| ISSN: |
2100-014X |
| DOI: |
10.1051/epjconf/202430908008 |
| Popis: |
In the framework of optical frequency conversion, metasurfaces have elevated the potential for effective interfacial nonlinear coefficients through various modes of field localization. For the generation of pulsed ultrafast terahertz (THz) signals, metasurfaces present a viable alternative in the domain of surface-scalable sources driven by low-power oscillators (using nJ pulses). However, recent innovations have predominantly relied on surface plasmons (metals) and, more broadly, on excitations within non-transparency windows—conditions that typically impose limitations on applications and the choice of platforms. Here, we demonstrate the utilization of a fully-dielectric, fully transparent semiconductor that exploits surface-nano-structure-mediated resonances alongside its inherent quadratic nonlinear response. Our system exhibits a remarkable 40-fold efficiency enhancement in comparison to the non-decorated substrate. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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