物理
量子纠缠
极化(电化学)
光子
自发参量下转换
光学
宽带
光子偏振
相位匹配
量子光学
非线性光学
参数统计
量子
光子纠缠
量子信息科学
非线性系统
量子隐形传态
量子力学
量子信道
四波混频
光子学
光电子学
量子态
量子密钥分配
自由度(物理和化学)
量子成像
量子网络
圆极化
量子信息
分束器
相位调制
作者
Vitaliy Sultanov,Tomás Santiago‐Cruz,Maria V. Chekhova
出处
期刊:Optics Letters
[Optica Publishing Group]
日期:2022-07-08
卷期号:47 (15): 3872-3872
被引量:1
摘要
The concept of “flat optics” is quickly conquering different fields of photonics, but its implementation in quantum optics is still in its infancy. In particular, polarization entanglement, strongly required in quantum photonics, is so far not realized on “flat” platforms. Meanwhile, relaxed phase matching of “flat” nonlinear optical sources enables enormous freedom in tailoring their polarization properties. Here we use this freedom to generate photon pairs with tunable polarization entanglement via spontaneous parametric downconversion (SPDC) in a 400-nm GaP film. By changing the pump polarization, we tune the polarization state of photon pairs from maximally entangled to almost disentangled, which is impossible in a single bulk SPDC source. Polarization entanglement, together with the broadband frequency spectrum, results in an ultranarrow (12 fs) Hong–Ou–Mandel effect and promises extensions to hyperentanglement.
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