Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

Asia Communications and Photonics Conference

Relieving the Limit of Photon-pairs Generation Rate in Microresonators

Nuo Chen, Wang Zijie, Hanghang Li, Zhuang Fan, Runru Fan, Qiang Zhou, Xinliang Zhang, Jing Ming Xu

Published Nov 4, 2023• 0 citations
Publisher

Abstract

Photon-pairs generation rate (PGR) based on spontaneous nonlinear processes in microresonators is found to be limited set by the quality (Q) factors of the cavity resonances.
DOI
10.1109/acp/poem59049.2023.10368671

Related papers

Pushing photon-pair generation rate in microresonators by Q factor manipulation

Nuo Chen, Zijie Wang, Jingpeng Wu +7 more

Photon pairs generated by employing spontaneous nonlinear effects in microresonators are critically essential for integrated optical quantum information technologies, such as quantum computation and quantum cryptography. Microresonators featuring high-quality (Q) factors can offer simple yet power-efficient means to generate photon pairs, thanks to the intracavity field enhancement. In microresonators, it is known that the photon-pair generation rate (PGR) is roughly proportional to the cubic power of the Q factor. However, the upper limit on PGR is also set by the Q factor: a higher Q factor brings a longer photon lifetime, which in turn leads to a lower repetition rate allowing for photon flow emitted from the microresonator, constrained by the Fourier-transform limit. Exceeding this limit will result in the overlap of photon wave packets in the time domain, thus degrading the quantum character of single-photon light beams. To push the limit of PGR in a single resonator, we propose a method by harnessing the resonance linewidth-manipulated microresonators to improve the maximum achievable photon repetition rate while keeping the power efficiency. The maximum achievable PGR and power efficiency are thus balanced by leveraging the combination of low and high-Q resonances.

Optics Letters•Sep 11, 2023•8 citations

High-rate and high-brightness photon-pair generation from silicon microring resonator

Shoichiro Yasui, Tomohiro Inaba, Hidetaka Nishi +4 more

International Conference on Solid State Devices and Materials (SSDM)•Sep 16, 2025•0 citations

Shaping the spectral correlation of bi-photon quantum frequency combs by multi-frequency excitation of an SOI integrated nonlinear resonator

Alí Angulo, Jan Heine, J. S. S. Durán Gómez +5 more

We reveal the generation of a broadband (> 1.9 THz) bi-photon quantum frequency comb (QFC) in a silicon-on-insulator (SOI) Fabry–Pérot micro-cavity and the control of its spectral correlation properties. Correlated photon pairs are generated through three spontaneous four-wave mixing (SFWM) processes by using a co-polarized bi-chromatic coherent input with power P 1 and P 2 on adjacent resonances of the nonlinear cavity. Adjusting the spectral power ratio r = P 1 /( P 1 + P 2 ) allows control over the influence of each process leading to an enhancement of the overall photon pair generation rate (PGR) μ ( r ) by a maximal factor of μ ( r = 0.5)/ μ ( r = 0) ≈ 1.5, compared to the overall PGR provided by a single-pump configuration with the same power budget. We demonstrate that the efficiency a ND of the non-degenerate excitation SFWM process (NDP) doubles the efficiency a 1 ≈ a 2 of the degenerate excitation SFWM processes (DP), showing a good agreement with the provided model.

Optics Letters•Oct 4, 2023•2 citations

80 Channel Photon Pair Source from a Thin-Film Lithium Niobate Racetrack Microresonator

Mihir Chaudhari, Ian Christen, Xinyi Ren +6 more

Nanophotonic platforms have multiple properties and features desirable for producing correlated photon pairs. In these platforms, spontaneous parametric down-conversion (SPDC) and spontaneous four-wave-mixing (SFWM) have been used to achieve photon pair production. By placing the nonlinear region in a resonant cavity, the source obtains an enhanced nonlinear interaction and naturally filters out photons by frequency according to the cavity linewidth. Among various platforms, X-cut thin-film lithium niobate (TFLN) stands out for its strong second-order optical nonlinearity ($χ^{(2)}$) and access to a strong platform for modulating light. Although previously demonstrated, present sources are limited in their photon pair channel availability, limiting the potential of quantum applications in quantum information processing, communication, and sensing that can scale in robustness by having access to multiple photon pair channels. To this end, we demonstrate a photon pair source on X-cut TFLN with 80 measured photon pair channels spanning the C and L optical bands with a frequency spacing of 49.5 GHz between photons. We characterize the second-order correlation function and pair generation rate (PGR) of 80 channels, the highest number of channels demonstrated to date, and achieve a pair generation of 125.7 kHz / μW after accounting for the cavity's escape efficiency. We also demonstrate heralded single photon operation by calculating a heralded auto-correlation dip of 0.0544 $\pm$ 0.0054 with 2.2 mW of on-chip pump power. These findings demonstrate the promise of X-cut TFLN as a strong platform for quantum optical applications.

physics.opticsCross-listedarXiv:2607.16575•Jul 21, 2026•0 citations

Two-photon absorption effect on semiconductor microring resonators

Amin Ghadi, Saeed Mirzanejhad

Optik•May 25, 2015•7 citations

Entangled photon generation in a nonlinear microring resonator for birefringence-based sensing applications

Preecha P. Yupapin, P. Yabosdee, P. Phiphithirankarn

Optik•Sep 26, 2008•1 citation
Photon pairs generated by employing spontaneous nonlinear effects in microresonators are critically essential for integrated optical quantum information technologies, such as quantum computation and quantum cryptography. Microresonators featuring high-quality (Q) factors can offer simple yet power-efficient means to generate photon pairs, thanks to the intracavity field enhancement. In microresonators, it is known that the photon-pair generation rate (PGR) is roughly proportional to the cubic power of the Q factor. However, the upper limit on PGR is also set by the Q factor: a higher Q factor brings a longer photon lifetime, which in turn leads to a lower repetition rate allowing for photon flow emitted from the microresonator, constrained by the Fourier-transform limit. Exceeding this limit will result in the overlap of photon wave packets in the time domain, thus degrading the quantum character of single-photon light beams. To push the limit of PGR in a single resonator, we propose a method by harnessing the resonance linewidth-manipulated microresonators to improve the maximum achievable photon repetition rate while keeping the power efficiency. The maximum achievable PGR and power efficiency are thus balanced by leveraging the combination of low and high-Q resonances.
We reveal the generation of a broadband (> 1.9 THz) bi-photon quantum frequency comb (QFC) in a silicon-on-insulator (SOI) Fabry–Pérot micro-cavity and the control of its spectral correlation properties. Correlated photon pairs are generated through three spontaneous four-wave mixing (SFWM) processes by using a co-polarized bi-chromatic coherent input with power P 1 and P 2 on adjacent resonances of the nonlinear cavity. Adjusting the spectral power ratio r = P 1 /( P 1 + P 2 ) allows control over the influence of each process leading to an enhancement of the overall photon pair generation rate (PGR) μ ( r ) by a maximal factor of μ ( r = 0.5)/ μ ( r = 0) ≈ 1.5, compared to the overall PGR provided by a single-pump configuration with the same power budget. We demonstrate that the efficiency a ND of the non-degenerate excitation SFWM process (NDP) doubles the efficiency a 1 ≈ a 2 of the degenerate excitation SFWM processes (DP), showing a good agreement with the provided model.
Nanophotonic platforms have multiple properties and features desirable for producing correlated photon pairs. In these platforms, spontaneous parametric down-conversion (SPDC) and spontaneous four-wave-mixing (SFWM) have been used to achieve photon pair production. By placing the nonlinear region in a resonant cavity, the source obtains an enhanced nonlinear interaction and naturally filters out photons by frequency according to the cavity linewidth. Among various platforms, X-cut thin-film lithium niobate (TFLN) stands out for its strong second-order optical nonlinearity (χ(2)χ^{(2)}χ(2)) and access to a strong platform for modulating light. Although previously demonstrated, present sources are limited in their photon pair channel availability, limiting the potential of quantum applications in quantum information processing, communication, and sensing that can scale in robustness by having access to multiple photon pair channels. To this end, we demonstrate a photon pair source on X-cut TFLN with 80 measured photon pair channels spanning the C and L optical bands with a frequency spacing of 49.5 GHz between photons. We characterize the second-order correlation function and pair generation rate (PGR) of 80 channels, the highest number of channels demonstrated to date, and achieve a pair generation of 125.7 kHz / μW after accounting for the cavity's escape efficiency. We also demonstrate heralded single photon operation by calculating a heralded auto-correlation dip of 0.0544 ±\pm± 0.0054 with 2.2 mW of on-chip pump power. These findings demonstrate the promise of X-cut TFLN as a strong platform for quantum optical applications.