Enhanced efficiency of correlated photon pairs generation in silicon nitride with a low-loss 3D edge coupler

Xiaotian Zhu; Changyue Wang; Brent E Little; Z. Y. Ou; Sai T. Chu; Liang Cui; Xiaoying Li

doi:10.1063/5.0198693

Enhanced efficiency of correlated photon pairs generation in silicon nitride with a low-loss 3D edge coupler

Xiaotian Zhu, Changyue Wang, Brent E Little, Z. Y. Ou, Sai T. Chu^*, Liang Cui^*, Xiaoying Li^*

^*Corresponding author for this work

Department of Physics

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

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Abstract

We demonstrate the generation of correlated photon pairs by using a hybrid integrated quantum photonic platform, where the dual-layer platform consists of a high-index doped silica glass (HDSG) layer to accommodate low-loss linear components and an SiN-based layer to accommodate the photon source. Leveraging the low-loss fiber coupling to the HDSG waveguide and the high nonlinearity of the SiN waveguide, we experimentally realize integrated source of photon pairs with high heralding efficiency. The directly measured photon pair rate is up to 87 KHz (corresponding to 1.74× 10− 3 pairs per pulse) when the coincidence-to-accidental ratio is greater than 10. The raw heralding efficiency can reach 18%. If the filtering loss is excluded, the heralding efficiency can further reach 29%.

© Author(s) 2024

Original language	English
Article number	066102
Journal	APL Photonics
Volume	9
Issue number	6
Online published	6 Jun 2024
DOIs	https://doi.org/10.1063/5.0198693
Publication status	Published - Jun 2024

Funding

This work was supported by the National Natural Science Foundation of China (Grant Nos. 12074283 and 11874279), the General Research Fund from Hong Kong Research Grants Council (Grant No. 11307823), and the CityU New Research Initiatives/Infrastructure Support from Central (APRC) (Grant No. 9610395).

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This full text is made available under CC-BY 4.0. https://creativecommons.org/licenses/by/4.0/

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GRF: Integrated Sources of Quantum States and On-chip Quantum Interferometers
OU, J. (Principal Investigator / Project Coordinator)
1/01/24 → …
Project: Research

Cite this

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title = "Enhanced efficiency of correlated photon pairs generation in silicon nitride with a low-loss 3D edge coupler",

abstract = "We demonstrate the generation of correlated photon pairs by using a hybrid integrated quantum photonic platform, where the dual-layer platform consists of a high-index doped silica glass (HDSG) layer to accommodate low-loss linear components and an SiN-based layer to accommodate the photon source. Leveraging the low-loss fiber coupling to the HDSG waveguide and the high nonlinearity of the SiN waveguide, we experimentally realize integrated source of photon pairs with high heralding efficiency. The directly measured photon pair rate is up to 87 KHz (corresponding to 1.74× 10− 3 pairs per pulse) when the coincidence-to-accidental ratio is greater than 10. The raw heralding efficiency can reach 18%. If the filtering loss is excluded, the heralding efficiency can further reach 29%.{\textcopyright} Author(s) 2024",

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T1 - Enhanced efficiency of correlated photon pairs generation in silicon nitride with a low-loss 3D edge coupler

AU - Zhu, Xiaotian

AU - Wang, Changyue

AU - Little, Brent E

AU - Ou, Z. Y.

AU - Chu, Sai T.

AU - Cui, Liang

AU - Li, Xiaoying

PY - 2024/6

Y1 - 2024/6

N2 - We demonstrate the generation of correlated photon pairs by using a hybrid integrated quantum photonic platform, where the dual-layer platform consists of a high-index doped silica glass (HDSG) layer to accommodate low-loss linear components and an SiN-based layer to accommodate the photon source. Leveraging the low-loss fiber coupling to the HDSG waveguide and the high nonlinearity of the SiN waveguide, we experimentally realize integrated source of photon pairs with high heralding efficiency. The directly measured photon pair rate is up to 87 KHz (corresponding to 1.74× 10− 3 pairs per pulse) when the coincidence-to-accidental ratio is greater than 10. The raw heralding efficiency can reach 18%. If the filtering loss is excluded, the heralding efficiency can further reach 29%.© Author(s) 2024

AB - We demonstrate the generation of correlated photon pairs by using a hybrid integrated quantum photonic platform, where the dual-layer platform consists of a high-index doped silica glass (HDSG) layer to accommodate low-loss linear components and an SiN-based layer to accommodate the photon source. Leveraging the low-loss fiber coupling to the HDSG waveguide and the high nonlinearity of the SiN waveguide, we experimentally realize integrated source of photon pairs with high heralding efficiency. The directly measured photon pair rate is up to 87 KHz (corresponding to 1.74× 10− 3 pairs per pulse) when the coincidence-to-accidental ratio is greater than 10. The raw heralding efficiency can reach 18%. If the filtering loss is excluded, the heralding efficiency can further reach 29%.© Author(s) 2024

U2 - 10.1063/5.0198693

DO - 10.1063/5.0198693

M3 - RGC 21 - Publication in refereed journal

SN - 2378-0967

VL - 9

JO - APL Photonics

JF - APL Photonics

IS - 6

M1 - 066102

ER -

Enhanced efficiency of correlated photon pairs generation in silicon nitride with a low-loss 3D edge coupler

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GRF: Integrated Sources of Quantum States and On-chip Quantum Interferometers

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