We demonstrate a monolithic III-V photonic circuit combining a heralded single photon source with a beamsplitter, at room temperature and telecom wavelength. Pulsed parametric down-conversion in an AlGaAs waveguide generates counterpropagating photons, one of which is used to herald the injection of its twin into the beamsplitter. We use this configuration to implement an integrated Hanbury-Brown and Twiss experiment, yielding a heralded second-order correlation gher(2)(0)=0.10±0.02 that confirms single-photon operation. The demonstrated generation and manipulation of quantum states on a single III-V semiconductor chip opens promising avenues towards real-world applications in quantum information.

中文翻译：

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预兆单光子源和分束器的片上 III-V 单片集成

我们展示了一种单片 III-V 光子电路，它在室温和电信波长下将预兆单光子源与分束器相结合。AlGaAs 波导中的脉冲参数下变频会产生反向传播的光子，其中一个光子用于预示其孪生体注入分束器。我们使用这种配置来实现集成的 Hanbury-Brown 和 Twiss 实验，产生预示的二阶相关性 gher(2)(0)=0.10±0.02，证实了单光子操作。在单个 III-V 族半导体芯片上展示的量子态的生成和操纵为量子信息的实际应用开辟了有希望的途径。