Title | Integrated Photonic Platform for Rare-Earth Ions in Thin Film Lithium Niobate |
Publication Type | Journal Article |
Year of Publication | 2020 |
Authors | S. Dutta, E. A. Goldschmidt, S. Barik, U. Saha, and E. Waks |
Journal | Nano Lett. |
Volume | 20 |
Pagination | 741-747 |
Date Published | JAN |
Type of Article | Article |
ISSN | 1530-6984 |
Keywords | integrated photonics, optical signal processing, Rare-earth ions, spectral hole burning quantum information processing, thin film lithium niobate |
Abstract | Rare-earth ion ensembles doped in single crystals are a promising materials system with widespread applications in optical signal processing, lasing, and quantum information processing. Incorporating rare-earth ions into integrated photonic devices could enable compact lasers and modulators, as well as on-chip optical quantum memories for classical and quantum optical applications. To this end, a thin film single crystalline wafer structure that is compatible with planar fabrication of integrated photonic devices would be highly desirable. However, incorporating rare-earth ions into a thin film form-factor while preserving their optical properties has proven challenging. We demonstrate an integrated photonic platform for rare-earth ions doped in a single crystalline thin film lithium niobate on insulator. The thin film is composed of lithium niobate doped with Tm3+. The ions in the thin film exhibit optical lifetimes identical to those measured in bulk crystals. We show narrow spectral holes in a thin film waveguide that require up to 2 orders of magnitude lower power to generate than previously reported bulk waveguides. Our results pave the way for scalable on-chip lasers, optical signal processing devices, and integrated optical quantum memories. |
DOI | 10.1021/acs.nanolett.9b04679 |