Related papers: Beyond critical coupling: optimal design considerations for spontaneous four-wave mixing in microring resonators

Beyond critical coupling: optimal design considerations for spontaneous four-wave mixing in microring resonators

URL: http://arxiv.org/abs/2511.08563v2
Date: Tue, 18 Nov 2025 17:37:30 GMT
Title: Beyond critical coupling: optimal design considerations for spontaneous four-wave mixing in microring resonators
Authors: Joseph M. Lukens, Karthik V. Myilswamy, Alexander Miloshevsky, Hsuan-Hao Lu,
Abstract summary: We present a self-contained analytical model for biphoton generation in microring resonators.<n>Our interaction-picture-based approach reveals time-frequency biphoton correlations while also predicting absolute generation rates.<n>As a whole, our formalism should prove valuable for the practical design of integrated photon sources.
Score: 39.786158632348986
License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
Abstract: We present a self-contained analytical model for biphoton generation in microring resonators. Encompassing both all-pass and add-drop geometries, identical and distinct pump and biphoton coupling coefficients, and continuous-wave and pulsed pumping, our interaction-picture-based approach reveals time-frequency biphoton correlations while also predicting absolute generation rates. Under continuous-wave excitation, we find critical coupling of both the pump and biphoton to maximize the rate of single photons extracted from the microring, whereas critical coupling of the pump but overcoupling of the biphoton maximize the two-photon rate. Under pulsed pumping, overcoupling of both pump and biphoton (to different degrees) maximizes photon extraction probabilities, albeit under a tradeoff with spectral factorability that we quantify via parameter scans over a range of coupler pairings. As a whole, our formalism should prove valuable for the practical design of integrated photon sources, merging a flexible and intuitive biphoton-centric depiction with quantitative predictions closely tied to experimental parameters.

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