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Ultra-bright entangled-photon pair generation from an AlGaAs-on-insulator microring resonator
- Source :
- PRX Quantum 2, 010337 (2021)
- Publication Year :
- 2020
-
Abstract
- Entangled-photon pairs are an essential resource for quantum information technologies. Chip-scale sources of entangled pairs have been integrated with various photonic platforms, including silicon, nitrides, indium phosphide, and lithium niobate, but each has fundamental limitations that restrict the photon-pair brightness and quality, including weak optical nonlinearity or high waveguide loss. Here, we demonstrate a novel, ultra-low-loss AlGaAs-on-insulator platform capable of generating time-energy entangled photons in a $Q$ $>1$ million microring resonator with nearly 1,000-fold improvement in brightness compared to existing sources. The waveguide-integrated source exhibits an internal generation rate greater than $20\times 10^9$ pairs sec$^{-1}$ mW$^{-2}$, emits near 1550 nm, produces heralded single photons with $>99\%$ purity, and violates Bell's inequality by more than 40 standard deviations with visibility $>97\%$. Combined with the high optical nonlinearity and optical gain of AlGaAs for active component integration, these are all essential features for a scalable quantum photonic platform.<br />Comment: 12 pages, 5 figures, 1 table
- Subjects :
- Quantum Physics
Subjects
Details
- Database :
- arXiv
- Journal :
- PRX Quantum 2, 010337 (2021)
- Publication Type :
- Report
- Accession number :
- edsarx.2009.13462
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1103/PRXQuantum.2.010337