Back to Search
Start Over
High-quality photonic entanglement based on a silicon chip
- Source :
- npj Quantum Inf. 6, 31 (2020)
- Publication Year :
- 2020
-
Abstract
- The fruitful association of quantum and integrated photonics holds the promise to produce, manipulate, and detect quantum states of light using compact and scalable systems. Integrating all the building-blocks necessary to produce high-quality photonic entanglement in the telecom wavelength range out of a single chip remains a major challenge, mainly due to the limited performance of on-chip light rejection filters. We report a stand-alone, telecom-compliant, device that integrates, on a single substrate, a nonlinear photon-pair generator and a passive pump rejection filter. Using standard channel-grid fiber demultiplexers, we demonstrate the first entanglement quantification of such a integrated circuit, showing the highest raw quantum interference visibility for energy-time entangled photons over two telecom-wavelength bands. Genuinely pure maximally entangled states can therefore be generated thanks to the high-level of noise suppression obtained with the pump filter. These results will certainly further promote the development of more advanced and scalable photonic-integrated quantum systems compliant with telecommunication standards.<br />Comment: 11 pages, 6 figures
- Subjects :
- Quantum Physics
Physics - Optics
Subjects
Details
- Database :
- arXiv
- Journal :
- npj Quantum Inf. 6, 31 (2020)
- Publication Type :
- Report
- Accession number :
- edsarx.2002.10106
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1038/s41534-020-0263-7