Generation, guiding and splitting of triggered single photons from a resonantly excited quantum dot in a photonic circuit.
Generation, guiding and splitting of triggered single photons from a resonantly excited quantum dot in a photonic circuit.
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DOI：
10.1364/oe.24.003089
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发表时间：
2016-02
期刊：
影响因子：
3.8
通讯作者：
Mario Schwartz;Ulrich Rengstl;T. Herzog;M. Paul;J. Kettler;S. Portalupi;M. Jetter;P. Michler
中科院分区：
文献类型：
--
作者：
Mario Schwartz;Ulrich Rengstl;T. Herzog;M. Paul;J. Kettler;S. Portalupi;M. Jetter;P. Michler
我们展示了嵌入在脉冲激光激发下操作的肋形波导分束器结构中的单个 In-GaAs/GaAs 量子点的共振荧光。对激发激光脉冲持续时间的系统研究表明，足够小的激光线宽能够显着提高波导芯片内的单光子与激光背景比。这体现在观察到量子点发射的两个周期内清晰的拉比振荡作为激光激发功率的函数。片上分束器两个输出臂之间的光子互相关测量结果为 g(2)(0)=0.18，证明了片上器件中在共振激励下触发的单光子的生成、引导和分裂。目前的结果为利用集成量子点作为谐振泵浦确定性单光子源实现光子量子电路开辟了新的视角。
We demonstrate resonance fluorescence from single In-GaAs/GaAs quantum dots embedded in a rib waveguide beamsplitter structure operated under pulsed laser excitation. A systematic study on the excitation laser pulse duration depicts that a sufficiently small laser linewidth enables a substantial improved single-photon-to-laser-background ratio inside a waveguide chip. This manifests in the observation of clear Rabi oscillations over two periods of the quantum dot emission as a function of laser excitation power. A photon cross-correlation measurement between the two output arms of an on-chip beamsplitter results in a g(2)(0)=0.18, demonstrating the generation, guiding and splitting of triggered single photons under resonant excitation in an on-chip device. The present results open new perspectives for the implementation of photonic quantum circuits with integrated quantum dots as resonantly-pumped deterministic single-photon sources.