Fully On-Chip Single-Photon Hanbury-Brown and Twiss Experiment on a Monolithic Semiconductor-Superconductor Platform
Fully On-Chip Single-Photon Hanbury-Brown and Twiss Experiment on a Monolithic Semiconductor-Superconductor Platform
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DOI：
10.1021/acs.nanolett.8b02794
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发表时间：
2018-11-01
期刊：
影响因子：
10.8
通讯作者：
Michler, Peter
中科院分区：
文献类型：
--
作者：
Schwartz, Mario;Schmidt, Ekkehart;Michler, Peter
与桌面实现相比，完全集成的量子光子电路在稳定性和可扩展性方面表现出明显的优势。它们将构成集成量子技术的根本性突破，例如量子模拟和量子计算。尽管事实上只有几个构建块是严格必要的，但同时实现它们是非常具有挑战性的。这对于在同一芯片上同时实现所有三个关键组件：单光子源，光子逻辑和单光子探测器尤其如此。在这里，我们提出了一个完全集成的Hanbury-Brown和Twiss设置在微米大小的足迹上，由嵌入量子点作为单光子源的砷化镓波导，波导分束器和两个超导纳米线单光子探测器组成。这使得在连续波和脉冲共振激励下的单光子水平上的二阶相关测量成为可能。所提出的原理验证实验证明了所有三个关键构建块的同时实现和操作，因此朝着完全集成的量子光学芯片迈出了重要的一步。
Fully integrated quantum photonic circuits show a clear advantage in terms of stability and scalability compared to tabletop implementations. They will constitute a fundamental breakthrough in integrated quantum technologies, as a matter of example, in quantum simulation and quantum computation. Despite the fact that only a few building blocks are strictly necessary, their simultaneous realization is highly challenging. This is especially true for the simultaneous implementation of all three key components on the same chip: single photon sources, photonic logic, and single-photon detectors. Here, we present a fully integrated Hanbury-Brown and Twiss setup on a micrometer-sized footprint consisting of a GaAs waveguide embedding quantum dots as single-photon sources, a waveguide beamsplitter, and two superconducting nanowire single-photon detectors. This enables a second-order correlation measurement on the single-photon level under both continuous-wave and pulsed resonant excitation. The presented proof-of-principle experiment proves the simultaneous realization and operation of all three key building blocks and therefore a major step towards fully integrated quantum optical chips.