Mid-infrared nonlinear optics in thin-film lithium niobate on sapphire
| Autor: | Mishra, Jatadhari, McKenna, Timothy P., Ng, Edwin, Stokowski, Hubert S., Jankowski, Marc, Langrock, Carsten, Heydari, David, Mabuchi, Hideo, Fejer, M. M., Safavi-Naeini, Amir H. |
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| Rok vydání: | 2021 |
| Předmět: | |
| Druh dokumentu: | Working Paper |
| Popis: | Periodically poled thin-film lithium niobate (TFLN) waveguides have emerged as a leading platform for highly efficient frequency conversion in the near-infrared. However, the commonly used silica bottom-cladding results in high absorption loss at wavelengths beyond 2.5 $\mu$m. In this work, we demonstrate efficient frequency conversion in a TFLN-on-sapphire platform, which features high transparency up to 4.5 $\mu$m. In particular, we report generating mid-infrared light up to 3.66 $\mu$m via difference-frequency generation of a fixed 1-$\mu$m source and a tunable telecom source, with normalized efficiencies up to 200%/W-cm$^2$. These results show TFLN-on-sapphire to be a promising platform for integrated nonlinear nanophotonics in the mid-infrared. Comment: The first four authors contributed equally to this work. 5 pages, 3 figures |
| Databáze: | arXiv |
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