Direct generation of frequency-bin entangled photons via two-period quasi-phase-matched parametric downconversion
Direct generation of frequency-bin entangled photons via two-period quasi-phase-matched parametric downconversion
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DOI：
10.1364/oe.27.001416
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发表时间：
2019-01-21
期刊：
影响因子：
3.8
通讯作者：
Edamatsu, Keiichi
中科院分区：
文献类型：
--
作者：
Kaneda, Fumihiro;Suzuki, Hirofumi;Edamatsu, Keiichi
我们报道了一个通过自发参量下转换直接产生频率仓纠缠光子对的简单方案。我们制作的具有两个不同极化周期的非线性光学晶体可以同时满足两个不同的、光谱对称的非简并准相位匹配条件，从而可以直接在两个离散的频率仓模式中产生纠缠。我们产生的光子对显示出具有高可见度拍频振荡的Hong-Ou-Mandel干涉-双模频箱纠缠的特征。此外，我们证明了确定性的纠缠模式转换从频率箱偏振模式，我们的源可以更灵活的各种量子应用。我们的方案可以推广到直接产生高维频仓纠缠，因此将成为频分复用光量子信息处理的关键技术。(C)2018年美国光学学会根据OSA开放获取出版协议的条款
We report a simple scheme for direct generation of frequency-bin entangled photon pairs via spontaneous parametric downconversion. Our fabricated nonlinear optical crystal with two different poling periods can simultaneously satisfy two different, spectrally symmetric nondegenerate quasi-phase-matching conditions, enabling the direct generation of entanglement in two discrete frequency-bin modes. our produced photon pairs exhibited Hong-Ou-Mandel interference with high-visibility beating oscillations- a signature of two-mode frequency-bin entanglement. Moreover, we demonstrate deterministic entanglement-mode conversion from frequency-bin to polarization modes, with which our source can be more versatile for various quantum applications. Our scheme can be extended to direct generation of high-dimensional frequency-bin entanglement, and thus will be a key technology for frequency-multiplexed optical quantum information processing. (C) 2018 Optical Society of America under the terms of the OSA Open Access Publishing Agreement