Optical spin-orbit interaction in spontaneous parametric downconversion
Optical spin-orbit interaction (SOI), which can be used to simultaneously control the spin and orbital angular momentum of light, is important for both classical and quantum information applications. In linear and nonlinear optics, the SOI of light has been extensively explored in both artificial structures and conventional optical crystals.However, optical SOI in quantum nonlinear optical processes, such as spontaneous parametric downconversion (SPDC), has not been studied before. Here, we experimentally demonstrate that optical SOI in the SPDC process can be realized through a nonlinear crystal with threefold rotational symmetry. Two-photon quantum states with controlled angular momentum can be generated through the symmetry selection rules in nonlinear optics and the SOI of the pump wave. The proposed methodology may facilitate the generation and control of spin and orbital angular momentum of entangled photons.
National Natural Science Foundation of China["12161141010","62061160487","62205325","91950114"] ; Zhangjiang Laboratory, Guangdong Provincial Innovation and Entrepreneurship Project[2017ZT07C071] ; Natural Science Foundation of Shenzhen Innovation Commission[JCYJ20200109140808088] ; Innovation Program for Quantum Science and Technology["2021ZD0301500","2021ZD0303200"] ; China Postdoctoral Science Foundation[2022M723067]
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Cited Times [WOS]:0
|Document Type||Journal Article|
|Department||Department of Materials Science and Engineering|
1.CAS Key Laboratory of Quantum Information,University of Science and Technology of China,Hefei,230026,China
2.Department of Materials Science and Engineering,Southern University of Science and Technology,Shenzhen,518055,China
3.CAS Synergetic Innovation Center of Quantum Information & Quantum Physics,University of Science and Technology of China,Hefei,230026,China
4.Hefei National Laboratory,University of Science and Technology of China,Hefei,230088,China
|Corresponding Author Affilication||Department of Materials Science and Engineering|
Wu，Yunkun,Tang，Yutao,Hu，Zixian,et al. Optical spin-orbit interaction in spontaneous parametric downconversion[J]. Optica,2023,10(5):538-543.
Wu，Yunkun.,Tang，Yutao.,Hu，Zixian.,Feng，Lantian.,Guo，Guangcan.,...&Li，Guixin.(2023).Optical spin-orbit interaction in spontaneous parametric downconversion.Optica,10(5),538-543.
Wu，Yunkun,et al."Optical spin-orbit interaction in spontaneous parametric downconversion".Optica 10.5(2023):538-543.
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