Spontaneous Parametric Down‐Conversion in 4H‐SiC Integrated Platform
Abstract 4H‐silicon carbide (SiC) has recently emerged as a promising material for nonlinear photonic integrated circuits, thanks to its low loss, wide bandgap, as well as strong second‐order () and third‐order () nonlinearities. Though its unique crystal structure allows versatile processes, spontaneous parametric down‐conversion (SPDC) still remains unrealized. In this work, photon‐pair generation in a 4H‐SiC‐on‐insulator integrated platform is demonstrated through modal‐phase‐matched type‐I SPDC. Furthermore, type‐0 and type‐II nonlinear interactions are shown in 4H‐SiC waveguides, thus highlighting the potential to exploit diverse phase‐matching mechanisms on this platform. These results underscore the potential of 4H‐SiC for advancing the development of integrated quantum photonics in the realms of quantum information processing and quantum communication.
Authors
- Xiaodong Shi (ORCID: https://orcid.org/0000-0001-9154-6663)
- Veerendra Dhyani (ORCID: https://orcid.org/0000-0002-9473-6443)
- Jiapeng Sun (ORCID: https://orcid.org/0000-0002-3454-1759)
- Di Zhu (ORCID: https://orcid.org/0000-0003-0210-1860)
- Haiyan Ou (ORCID: https://orcid.org/0000-0002-0538-8230)
- Victor Leong (ORCID: https://orcid.org/0000-0003-3672-2235)
- Karsten Rottwitt (ORCID: https://orcid.org/0000-0001-6738-5847)
- Angela Anna Baiju
- Yongsheng Wang (ORCID: https://orcid.org/0000-0002-8705-548X)
- Sihao Wang (ORCID: https://orcid.org/0000-0003-4572-8030)
- Bin Deng (ORCID: https://orcid.org/0000-0002-5590-3755)
- Jingjing Zhang (ORCID: https://orcid.org/0000-0001-9589-8607)
- Sakthi Sanjeev Mohanraj
Institutions
- Agency for Science, Technology and Research (SG)
- Centre for Quantum Technologies (SG)
- National University of Singapore (SG)
- Institute of Materials Research and Engineering (SG)
- Technical University of Denmark (DK)
Publication Details
- Journal
- Laser & Photonics Review
- Published
- 2025-05-01
- DOI
- https://doi.org/10.1002/lpor.202500104
- Citations
- 3
- Primary Topic
- Advanced Fiber Laser Technologies
- Type
- article
- Field-Weighted Citation Impact
- 3.74
Funders
- Villum Fonden
- National Research Foundation
- Agency for Science, Technology and Research
- National Research Foundation Singapore