Room-temperature on-chip orbital angular momentum single-photon sources

Cuo Wu, Shailesh Kumar, Yinhui Kan, Danylo Komisar, Zhiming Wang, Sergey I. Bozhevolnyi, Fei Ding*

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

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On-chip photon sources carrying orbital angular momentum (OAM) are in demand for high-capacity optical information processing in both classical and quantum regimes. However, currently exploited integrated OAM sources have been primarily limited to the classical regime. Here, we demonstrate a room-temperature on-chip integrated OAM source that emits well-collimated single photons, with a single-photon purity of g(2)(0) ≈ 0.22, carrying entangled spin and OAM states and forming two spatially separated entangled radiation channels with different polarization properties. The OAM-encoded single photons are generated by efficiently outcoupling diverging surface plasmon polaritons excited with a deterministically positioned quantum emitter via Archimedean spiral gratings. Our OAM single-photon source platform bridges the gap between conventional OAM manipulation and nonclassical light sources, enabling high-dimensional and large-scale photonic quantum systems for quantum information processing.

Original languageEnglish
Article numbereabk3075
JournalScience Advances
Issue number2
Publication statusPublished - 11. Mar 2022


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