arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1407.3541cond-mat.mes-hallquant-ph
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银嵌入结构中InAs量子点单发射的双光子干涉和相干控制

Two-photon interference and coherent control of single InAs quantum dot emissions in an Ag-embedded structure

X. Liu, H. Kumano, H. Nakajima, S. Odashima, T. Asano, T. Kuroda, I. Suemune

摘要:

我们最近报道了成功的制造明亮的单光子源的基础上银嵌入式纳米锥结构,将InAs量子点。该光源的光子收集效率高达24.6%。在这里,我们展示了各种类型的光子表征的银嵌入的纳米锥结构,确认其多功能性方面的广泛的量子光学应用的结果。我们测量了一阶自相关函数来评估发射光子的相干时间,以及二阶关联函数,这揭示了多光子产生的强烈抑制。Hong-Ou-Mandel型双光子干涉显示出发射光子的高不可分辨性。在准共振激发下,通过拉比振荡证明了相干布居翻转。利用$π$脉冲准共振激发实现了$g^{(2)}$(0)值为0.008的极高单光子纯度。

英文摘要:

We have recently reported the successful fabrication of bright single-photon sources based on Ag-embedded nanocone structures that incorporate InAs quantum dots. The source had a photon collection efficiency as high as 24.6%. Here we show the results of various types of photonic characterizations of the Ag-embedded nanocone structures that confirm their versatility as regards a broad range of quantum optical applications. We measure the first-order autocorrelation function to evaluate the coherence time of emitted photons, and the second-order correlation function, which reveals the strong suppression of multiple photon generation. The high indistinguishability of emitted photons is shown by the Hong-Ou-Mandel-type two-photon interference. With quasi-resonant excitation, coherent population flopping is demonstrated through Rabi oscillations. Extremely high single-photon purity with a $g^{(2)}$(0) value of 0.008 is achieved with $π$-pulse quasi-resonant excitation.

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