Cascaded single-photon emission from the Mollow triplet sidebands of a quantum dot
Cascaded single-photon emission from the Mollow triplet sidebands of a quantum dot
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DOI：
10.1038/nphoton.2012.23
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发表时间：
2012-04-01
期刊：
影响因子：
35
通讯作者：
Michler, P.
中科院分区：
文献类型：
--
作者：
Ulhaq, A.;Weiler, S.;Michler, P.
共振激发量子发射器的发射是量子光学领域内一个令人着迷的研究课题，并且是不同类型量子光场的有用来源。共振光谱由单条谱线组成，该谱线在量子发射器饱和度以上发展成三重态 (1-3)。来自共振荧光的三个间隔很近的光子通道具有不同的光子统计特征(4)。我们对固态人造原子（即半导体量子点）的共振荧光发射三重态进行了详细的光子统计分析。光子相关测量显示了来自莫洛三重态边带的“单”和“级联”光子发射(5)。明亮的窄边带发射（每秒 5.9 x 10(6) 个光子进入第一个透镜）可以通过超过其线宽 15 倍的激光失谐（Delta v 接近 1.0 GHz）方便地进行频率调谐。这些独特的特性使莫洛三重态边带发射成为量子光谱和量子信息应用等有价值的光源。
Emission from a resonantly excited quantum emitter is a fascinating research topic within the field of quantum optics and is a useful source for different types of quantum light fields. The resonance spectrum consists of a single spectral line that develops into a triplet above saturation of the quantum emitter(1-3). The three closely spaced photon channels from the resonance fluorescence have different photon statistical signatures(4). We present a detailed photon statistics analysis of the resonance fluorescence emission triplet from a solid-state-based artificial atom, that is, a semiconductor quantum dot. The photon correlation measurements demonstrate both 'single' and 'cascaded' photon emission from the Mollow triplet sidebands(5). The bright and narrow sideband emission (5.9 x 10(6) photons per second into the first lens) can be conveniently frequency-tuned by laser detuning over 15 times its linewidth (Delta v approximate to 1.0 GHz). These unique properties make the Mollow triplet sideband emission a valuable light source for quantum light spectroscopy and quantum information applications, for example.