Simulation-guided design of an integrated photonic cavity for frequency-multiplexed Spontaneous Parametric Down Conversion
Abstract
Frequency-multiplexed entangled photon pair sources with narrow bandwidths and high pair generation efficiency are a key enabling technology for quantum networking. We present a simulation-based design study of an integrated photonic racetrack resonator source for spontaneous parametric down-conversion (SPDC) that simultaneously achieves all three properties. The central result is a simulated set of 90 doubly resonant signal/idler frequency-mode pairs with an effective Schmidt number of 89.62, average bandwidths of 1.08 GHz, a mean free spectral range of 51.9 GHz, and a total internal pair-generation-rate efficiency of 1.16 GHz/mW. Under deterministic wavelength-based splitting, the accessible frequency-state Schmidt number is reduced to 44.93. To support these predictions, we derive a closed-form analytical connection between classical cavity parameters (resonant frequencies, decay rates, coupling coefficients) and the quantum joint spectral amplitude and pair generation rate, extending the dispersive-medium quantization formalism of Raymer to the nonlinear optical cavity case. We demonstrate how classical electromagnetic field simulations can be combined with this analytical framework to predict quantum figures of merit for an integrated photonic source prior to fabrication. Fabrication and experimental validation are left for future work.
Versions
Related
- Heralded one-, two- and three-photon states from waveguided parametric down-conversion
- Multiple soliton regimes enabled by parametric down-conversion in χ(2)+χ(3) microresonators
- Coupled Loop-within-Loop Resonators at the near-field: Extended Bandwidth and Short Pulse Response upon Parametric Conversion
- Multi-Parameter Error Mitigation in Parametric Down-Conversion via SU(1, 1) Composite Segmentation
- A robust framework for the comprehensive characterisation of parametric down-conversion sources
BibTeX
@misc{szamosfalvi2026simulationguided,
title = {{Simulation-guided design of an integrated photonic cavity for frequency-multiplexed Spontaneous Parametric Down Conversion}},
author = {Benjamin Szamosfalvi and Michael Raymer and CJ Xin and Leticia Magalhaes and Jarrett Nelson and Marko Lončar and Ryan M. Camacho},
howpublished = {arXiv},
year = {2026},
month = may,
doi = {10.48550/arxiv.2605.03121},
eprint = {2605.03121},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2605.03121},
}
RIS
TY - UNPB
TI - Simulation-guided design of an integrated photonic cavity for frequency-multiplexed Spontaneous Parametric Down Conversion
AU - Benjamin Szamosfalvi
AU - Michael Raymer
AU - CJ Xin
AU - Leticia Magalhaes
AU - Jarrett Nelson
AU - Marko Lončar
AU - Ryan M. Camacho
PY - 2026
DA - 2026/05/18
PB - arXiv
DO - 10.48550/arxiv.2605.03121
UR - https://arxiv.org/abs/2605.03121
AB - Frequency-multiplexed entangled photon pair sources with narrow bandwidths and high pair generation efficiency are a key enabling technology for quantum networking. We present a simulation-based design study of an integrated photonic racetrack resonator source for spontaneous parametric down-conversion (SPDC) that simultaneously achieves all three properties. The central result is a simulated set of 90 doubly resonant signal/idler frequency-mode pairs with an effective Schmidt number of 89.62, average bandwidths of 1.08 GHz, a mean free spectral range of 51.9 GHz, and a total internal pair-generation-rate efficiency of 1.16 GHz/mW. Under deterministic wavelength-based splitting, the accessible frequency-state Schmidt number is reduced to 44.93. To support these predictions, we derive a closed-form analytical connection between classical cavity parameters (resonant frequencies, decay rates, coupling coefficients) and the quantum joint spectral amplitude and pair generation rate, extending the dispersive-medium quantization formalism of Raymer to the nonlinear optical cavity case. We demonstrate how classical electromagnetic field simulations can be combined with this analytical framework to predict quantum figures of merit for an integrated photonic source prior to fabrication. Fabrication and experimental validation are left for future work.
ER -