Integrated silicon photonics chip fabricated by CMOS compatible technology for low-bit-error-rate quantum key distribution

Quantum communication has extremely high security and is a development direction of future communication networks. In this paper, an on-chip path, off-chip polarization encoded quantum key distribution (QKD) chip is designed and fabricated using advanced silicon photonics fabrication technology. Usi...

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Bibliographic Details
Published in:Journal of optics (2010) 2023-11, Vol.25 (11), p.115701
Main Authors: Zhen, Zhen, Jin, Si-Yue, Jie, Ren, Xu, Xing-Sheng
Format: Article
Language:English
Subjects:
integrated silicon photonics chip
low-bit-error-rate
quantum key distribution
two-dimensional grating
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Summary:Quantum communication has extremely high security and is a development direction of future communication networks. In this paper, an on-chip path, off-chip polarization encoded quantum key distribution (QKD) chip is designed and fabricated using advanced silicon photonics fabrication technology. Using a special two-dimensional grating, we can convert light of different path states into corresponding polarization states and propagate in fiber. The performance of the basic optics, waveguides, gratings, and Mach–Zehnder interferometers on the chip is characterized. In the demonstrated QKD experiment, the quantum bit error rate is as low as 1.08%. It provides an important device for the future development of advanced integrated quantum information.
ISSN:2040-8978
2040-8986
DOI:10.1088/2040-8986/acfbe9