在80K运行的钻石SiV中心过渡处,单个和纠的光子的固态源
Xin Cao1, Jingzhong Yang1, Tom Fandrich1
1Institut für Festkörperphysik, Leibniz Universität Hannover, Appelstraße 2, 30167, Hannover, Germany.
Nano letters
|June 28, 2023
概括
经过表轴培养的GaAs/AlGaAs量子点为量子网络提供了一个有前途的解决方案. 这些量子点产生高纯度的单个和纠的光子,对于推进量子光子应用至关重要.
科学领域:
- 量子信息科学 量子信息科学
- 纳米光子学 纳米光子学
- 材料科学 材料科学 材料科学
背景情况:
- 量子网络需要长寿的量子记忆来实现静止节点.
- 量子点是产生纯单一和纠光子的有希望的方法.
- 混合系统将量子点与内存相结合,以提高功能.
研究的目的:
- 为量子网络应用开发GaAs/AlGaAs量子点.
- 为了证明这些量子点产生的高纯度纠光子的产生.
- 为了评估这些量子点在不同温度下的性能.
主要方法:
- 使用滴滴蚀刻和纳米孔填充的GaAs/AlGaAs量子点的长轴增长.
- 单光子发射特性 (波长,纯度) 的表征.
- 通过 biexciton-exciton级联生成和测量极化纠的光子.
主要成果:
- GaAs/AlGaAs量子点在736.2±1.7纳米发射单个光子,位于空零声波线附近.
- 极化纠的光子生成的忠实度为 (0.73 ± 0.09).
- 高单光子纯度 (g(2)(0)) 在4K (0.07 ± 0.02) 到80K (0.11 ± 0.01) 之间保持.
结论:
- 这项工作介绍了第一个通过滴滴蚀刻和纳米孔填充生长的GaAs/AlGaAs量子点.
- 演示的性能使得这种混合系统对现实世界量子光子应用具有吸引力.
- 光子纯度的温度稳定性是实际实施的一个关键优势.
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