Mid-infrared nonlinear optics in thin-film lithium niobate on sapphire
Abstract
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 µm. In this work, we demonstrate efficient frequency conversion in a TFLN-on-sapphire platform, which features high transparency up to 4.5 µm. In particular, we report generating mid-infrared light up to 3.66 µm via difference-frequency generation of a fixed 1 µm source and a tunable telecom source, with normalized efficiencies up to 200 % / W c m 2 . These results show TFLN-on-sapphire to be a promising platform for integrated nonlinear nanophotonics in the mid-infrared.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Jun 16, 2021
- Source ID
- 10.1364/optica.427428
Entities
People
- Amir H. Safavi-Naeini
- Carsten Langrock
- David Heydari
- Edwin Ng
- Hideo Mabuchi
- Hubert S. Stokowski
- Jatadhari Mishra
- M. M. Fejer
- Marc Jankowski
- Timothy P. McKenna
Organizations
- Defense Advanced Research Projects Agency
- NTT, Inc.
- National Center for Research Resources
- National Science Foundation
- Stanford University
- United States Department of Energy