Phase-locked indistinguishable photons with synthesized waveforms from a solid-state source
Phase-locked indistinguishable photons with synthesized waveforms from a solid-state source
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DOI：
10.1038/ncomms2601
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发表时间：
2013-03-01
影响因子：
16.6
通讯作者：
Atatuere, Mete
中科院分区：
文献类型：
--
作者：
Matthiesen, Clemens;Geller, Martin;Atatuere, Mete
海特勒体系中的共振荧光提供了对单光子的访问，其相干性远远超出了跃迁的傅里叶变换极限，并有望规避所有固态系统常见的环境引起的相移。在这里，我们证明了从单个自组装 InAs 量子点产生的相干单光子在超过 3 s 的时间尺度上与激发激光表现出相互相干性。利用这种程度的相互相干性，我们通过塑造激发激光场来合成近乎任意的相干光子波形。与发射后滤波相比，我们的技术避免了所有合成波形的光子损失和单光子性质的退化。通过设计单光子的脉冲波形，我们进一步证明，由同一激光场相干产生的单独光子基本上是无法区分的，这有助于通过量子干涉产生遥远的纠缠。
Resonance fluorescence in the Heitler regime provides access to single photons with coherence well beyond the Fourier transform limit of the transition, and holds the promise to circumvent environment-induced dephasing common to all solid-state systems. Here we demonstrate that the coherently generated single photons from a single self-assembled InAs quantum dot display mutual coherence with the excitation laser on a timescale exceeding 3 s. Exploiting this degree of mutual coherence, we synthesize near-arbitrary coherent photon waveforms by shaping the excitation laser field. In contrast to post-emission filtering, our technique avoids both photon loss and degradation of the single-photon nature for all synthesized waveforms. By engineering pulsed waveforms of single photons, we further demonstrate that separate photons generated coherently by the same laser field are fundamentally indistinguishable, lending themselves to the creation of distant entanglement through quantum interference.