Chip-integrated visible-telecom entangled photon pair source for quantum communication
Open accessAbstract
Photon pair sources are fundamental building blocks for quantum entanglement and quantum communication. Recent studies in silicon photonics have documented promising characteristics for photon pair sources within the telecommunications band, including sub-milliwatt optical pump power, high spectral brightness, and high photon purity. However, most quantum systems suitable for local operations, such as storage and computation, support optical transitions in the visible or short near-infrared bands. In comparison to telecommunications wavelengths, the significantly higher optical attenuation in silica at such wavelengths limits the length scale over which optical-fiber-based quantum communication between such local nodes can take place. One approach to connect such systems over fiber is through a photon pair source that can bridge the visible and telecom bands, but an appropriate source, which should produce narrow-band photon pairs with a high signal-to-noise ratio, has not yet been developed. Here, we demonstrate an on-chip visible-telecom photon pair source for the first time, using high quality factor silicon nitride microresonators to generate bright photon pairs with an unprecedented coincidence-to-accidental ratio (CAR) up to (3.8 ± 0.2) × 10 3. We further demonstrate dispersion engineering of the microresonators to enable the connection of different species of trapped atoms/ions, defect centers, and quantum dots to the telecommunications bands for future quantum communication systems.
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Recent advances in device fabrication techniques have led to the ability to lithographically create highly-confined waveguides and compact micro-resonators, which enables precise dispersion engineering.
“Recent advances in device fabrication techniques have led to the ability to lithographically create highly-confined waveguides and compact micro-resonators, which enables precise dispersion engineering [97].”
From 2022 Roadmap on integrated quantum photonics (2022) · cites this paper as [97]
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“Recent advances in device fabrication techniques have led to the ability to lithographically create highly-confined waveguides and compact micro-resonators, which enables precise dispersion engineering [97].”
BackgroundSelf-citation
- Authors
- Lu, X., Li, Q., Westly, D. A., Moille, G., Singh, A., Anant, V., & Srinivasan, K.
- Affiliations
- National Institute of Standards and Technology (US)
- Photon Spot (United States) (US)
- Corresponding author
- Lu, Xiyuan
- Srinivasan, Kartik
- Venue
- Nature Physics
- Published
- 2019-01-21
- Volume
- 15
- Issue
- 4
- Pages
- 373-381
- ISSN
- 1745-2473 (ISSN-L)
- 1745-2481
- PMC
- PMC6605094
- OpenAlex
- W2799963729
- Cited by
- 272
- References
- 33
- Citations by year
- 2026: 28 · 2025: 40 · 2024: 48 · 2023: 45 · 2022: 34 · 2021: 37 · 2020: 23 · 2019: 16 · 2018: 1
- FWCI
- 12.55
- Type
- journal article
- Language
- en
- Open access
- green
- www.ncbi.nlm.nih.gov
- Licence
- www.springer.com/tdm (tdm)
- Locations
- Nature Physics (publishedVersion)
- PubMed (publishedVersion)
- PubMed Central (acceptedVersion)
- arXiv (Cornell University) (submittedVersion)
- Figshare (submittedVersion, public-domain)
- arXiv (Cornell University)
- Topics
- Physical Sciences › Computer Science › Artificial Intelligence › Quantum Information and Cryptography
- Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Quantum optics and atomic interactions
- Physical Sciences › Engineering › Electrical and Electronic Engineering › Photonic and Optical Devices
- Keywords
- entangled photon pair source, silicon nitride microresonators, energy-time entanglement, nanophotonics, dispersion engineering, coincidence-to-accidental ratio, defect centers, quantum dots, trapped ions
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