High-Efficiency InGaP-on-Insulator Microresonator Nonlinear Conversion and Entanglement Generation

[2605.15481] High-Efficiency InGaP-on-Insulator Microresonator Nonlinear Conversion and Entanglement Generation Skip to main content Search Submit Donate Log in Search arXiv Press Enter to search · Advanced search Physics > Applied Physics arXiv:2605.15481 (physics) [Submitted on 14 May 2026 ( v1 ), last revised 15 Aug 2026 (this version, v2)] Title: High-Efficiency InGaP-on-Insulator Microresonator Nonlinear Conversion and Entanglement Generation Authors: Xuefeng Li , Lillian Thiel , Yiming Pang , Amalu Shimamura , Lucas Wang , Joshua Castro , Max Meunier , Nicholas Lewis , John Bowers , Kevin Silverman , Richard Mirin , Galan Moody View a PDF of the paper titled High-Efficiency InGaP-on-Insulator Microresonator Nonlinear Conversion and Entanglement Generation, by Xuefeng Li and 11 other authors View PDF HTML (experimental) Abstract: InGaP-on-insulator (InGaP-OI), with its intrinsically high $\chi^{\left(2\right)}$ optical nonlinearity, has emerged as an efficient and bright integrated photonic platform for frequency conversion and on-chip entanglement generation, but high waveguide propagation loss in the visible wavelength range has limited its overall performance. Here, we identify the dominant loss mechanism through mode-profile analysis and effectively mitigate the loss using a surface treatment method. Statistical analysis of the resonator quality factor and propagation loss reveals the optimal ring radius that maintains a strong nonlinear interaction while suppressing significant bending related loss, resulting in loss as low as 0.49 dB/cm (4.31 dB/cm) at 1560 nm (780 nm). The method provides a 3.5--4$\times$ quality factor enhancement at 780 nm, enabling a second-harmonic generation efficiency of $3.01\times10^{5}$ \,\%/\textrm{W} and a degenerate photon-pair generation rate of $4.27\,\textrm{MHz}/\mu\textrm{W}$ and coincidence-to-accidental ratio as high as 10,000. The quasi-phase matching condition is experimentally verified, and nonlinear conversion is systematically characterized across the entire parameter space. This work establishes a scalable pathway for classical and quantum photonics in a low-loss, highly nonlinear, and wafer-scale integration platform. Subjects: Applied Physics (physics.app-ph) Cite as: arXiv:2605.15481 [physics.app-ph] (or arXiv:2605.15481v2 [physics.app-ph] for this version) https://doi.org/10.48550/arXiv.2605.15481 Focus to learn more arXiv-issued DOI via DataCite Submission history From: Xuefeng Li [ view email ] [v1] Thu, 14 May 2026 23:50:06 UTC (13,431 KB) [v2] Sat, 15 Aug 2026 07:34:52 UTC (6,198 KB) Full-text links: Access Paper: View a PDF of the paper titled High-Efficiency InGaP-on-Insulator Microresonator Nonlinear Conversion and Entanglement Generation, by Xuefeng Li and 11 other authors View PDF HTML (experimental) TeX Source view license Current browse context: physics.app-ph < prev | next > new | recent | 2026-05 Change to browse by: physics References & Citations NASA ADS Google Scholar Semantic Scholar export BibTeX citation Loading... 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