Abstract
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.
| Originalsprog | Engelsk |
|---|---|
| Artikelnummer | eabk3075 |
| Tidsskrift | Science Advances |
| Vol/bind | 8 |
| Udgave nummer | 2 |
| ISSN | 2375-2548 |
| DOI | |
| Status | Udgivet - 11. mar. 2022 |
Bibliografisk note
Funding Information:C.W. and F.D. appreciate the helpful discussion with J. Wang from Peking University. Funding: The work was funded by the Villum Fonden (award in Technical and Natural Sciences 2019, grant nos. 00022988, 37372, and 35950). Z.W. and C.W. acknowledge the support from the National Key Research and Development Program of China (2019YFB2203400), the ?111 Project? (B20030), the UESTC Shared Research Facilities of Electromagnetic Wave and Matter Interaction (Y0301901290100201), and the China Scholarship Council (grant no. 2020023TO014). Y.K. acknowledges the support from Fundamental Research Fund for Central Universities (NS2021064), National Natural Science Foundation of China (grant no. 62105150), and Natural Science Foundation of Jiangsu Province (BK20210289).
Publisher Copyright:
© 2022 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC).