中国物理B ›› 2024, Vol. 33 ›› Issue (3): 34208-034208.doi: 10.1088/1674-1056/ad1c5d

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Engineering the spectra of photon triplets generated from micro/nanofiber

Chuan Qu(瞿川), Dongqin Guo(郭东琴), Xiaoxiao Li(李笑笑), Zhenqi Liu(刘振旗), Yi Zhao(赵义),Shenghai Zhang(张胜海), and Zhengtong Wei(卫正统)   

  1. The College of Basic Department, Information Engineering University, Zhengzhou 450000, China
  • 收稿日期:2023-11-23 修回日期:2024-01-08 接受日期:2024-01-09 出版日期:2024-02-22 发布日期:2024-02-29
  • 通讯作者: Zhengtong Wei E-mail:weizhengtong1987@126.com
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No. 61605249) and the Science and Technology Key Project of Henan Province of China (Grant Nos. 182102210577 and 232102211086).

Engineering the spectra of photon triplets generated from micro/nanofiber

Chuan Qu(瞿川), Dongqin Guo(郭东琴), Xiaoxiao Li(李笑笑), Zhenqi Liu(刘振旗), Yi Zhao(赵义),Shenghai Zhang(张胜海), and Zhengtong Wei(卫正统)   

  1. The College of Basic Department, Information Engineering University, Zhengzhou 450000, China
  • Received:2023-11-23 Revised:2024-01-08 Accepted:2024-01-09 Online:2024-02-22 Published:2024-02-29
  • Contact: Zhengtong Wei E-mail:weizhengtong1987@126.com
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No. 61605249) and the Science and Technology Key Project of Henan Province of China (Grant Nos. 182102210577 and 232102211086).

摘要: Quantum light sources are the core resources for photonics-based quantum information processing. We investigate the spectral engineering of photon triplets generated by third-order spontaneous parametric down-conversion in micro/nanofiber. The phase mismatching at one-third pump frequency gives rise to non-degenerate photon triplets, the joint spectral intensity of which has an elliptical locus with a fixed eccentricity of √6/3. Therefore, we propose a frequency-division scheme to separate non-degenerate photon triplets into three channels with high heralding efficiency for the first time. Choosing an appropriate pump wavelength can compensate for the fabrication errors of micro/nanofiber and also generate narrowband, non-degenerate photon triplet sources with a high signal-to-noise ratio. Furthermore, the long-period micro/nanofiber grating introduces a new controllable degree of freedom to tailor phase matching, resulting from the periodic oscillation of dispersion. In this scheme, the wavelength of photon triplets can be flexibly tuned using quasi-phase matching. We study the generation of photon triplets from this novel perspective of spectrum engineering, and we believe that this work will accelerate the practical implementation of photon triplets in quantum information processing.

关键词: photon triplets, micro/nanofiber, spectrum engineering

Abstract: Quantum light sources are the core resources for photonics-based quantum information processing. We investigate the spectral engineering of photon triplets generated by third-order spontaneous parametric down-conversion in micro/nanofiber. The phase mismatching at one-third pump frequency gives rise to non-degenerate photon triplets, the joint spectral intensity of which has an elliptical locus with a fixed eccentricity of √6/3. Therefore, we propose a frequency-division scheme to separate non-degenerate photon triplets into three channels with high heralding efficiency for the first time. Choosing an appropriate pump wavelength can compensate for the fabrication errors of micro/nanofiber and also generate narrowband, non-degenerate photon triplet sources with a high signal-to-noise ratio. Furthermore, the long-period micro/nanofiber grating introduces a new controllable degree of freedom to tailor phase matching, resulting from the periodic oscillation of dispersion. In this scheme, the wavelength of photon triplets can be flexibly tuned using quasi-phase matching. We study the generation of photon triplets from this novel perspective of spectrum engineering, and we believe that this work will accelerate the practical implementation of photon triplets in quantum information processing.

Key words: photon triplets, micro/nanofiber, spectrum engineering

中图分类号:  (Quantum state engineering and measurements)

  • 42.50.Dv
42.50.Ex (Optical implementations of quantum information processing and transfer) 42.65.Lm (Parametric down conversion and production of entangled photons) 42.81.-i (Fiber optics)