Ultra-low-power second-order nonlinear optics on a chip
Abstract
Second-order nonlinear optical processes convert light from one wavelength to another and generate quantum entanglement. Creating chip-scale devices to efficiently control these interactions greatly increases the reach of photonics. Existing silicon-based photonic circuits utilize the third-order optical nonlinearity, but an analogous integrated platform for second-order nonlinear optics remains an outstanding challenge. Here we demonstrate efficient frequency doubling and parametric oscillation with a threshold of tens of micro-watts in an integrated thin-film lithium niobate photonic circuit. We achieve degenerate and non-degenerate operation of the parametric oscillator at room temperature and tune its emission over one terahertz by varying the pump frequency by hundreds of megahertz. Finally, we observe cascaded second-order processes that result in parametric oscillation. These resonant second-order nonlinear circuits will form a crucial part of the emerging nonlinear and quantum photonics platforms.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Aug 04, 2022
- Source ID
- 10.1038/s41467-022-31134-5
Entities
People
- Amir H. Safavi-Naeini
- Carsten Langrock
- Christopher J. Sarabalis
- Hubert S. Stokowski
- Jason F. Herrmann
- Jatadhari Mishra
- Marc Jankowski
- Martin M. Fejer
- Timothy P. McKenna
- Vahid Ansari
Organizations
- NTT, Inc.
- National Science Foundation
- United States Department of Defense