Detuning-dependent Mollow triplet of a coherently-driven single quantum dot.
Detuning-dependent Mollow triplet of a coherently-driven single quantum dot.
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DOI：
10.1364/oe.21.004382
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发表时间：
2012-10
期刊：
影响因子：
3.8
通讯作者：
A. Ulhaq;S. Weiler;C. Roy;S. M. Ulrich;M. Jetter;S. Hughes;P. Michler
中科院分区：
文献类型：
--
作者：
A. Ulhaq;S. Weiler;C. Roy;S. M. Ulrich;M. Jetter;S. Hughes;P. Michler
本文对激光驱动的量子点在缀饰态下的共振荧光进行了实验和理论研究。我们探讨的声子散射和纯退相的失谐依赖的Mollow三重态的作用，并表明，三重态边带可能会扩大或缩小，增加失谐。基于极化子主方程的方法，其中包括电子-声子相互作用的非微扰，我们推导出一个完全解析的光谱表达式。关于失谐依赖，我们确定了光谱边带窄化或加宽的制度之间的交叉。我们还预测了声子诱导的压缩和反压缩的光谱共振的制度。将理论预测与单个In（Ga）As量子点的Mollow三重态共振发射的激光失谐依赖性的详细实验研究进行比较，结果显示出良好的一致性。
We present both experimental and theoretical investigations of a laser-driven quantum dot (QD) in the dressed-state regime of resonance fluorescence. We explore the role of phonon scattering and pure dephasing on the detuning-dependence of the Mollow triplet and show that the triplet sidebands may spectrally broaden or narrow with increasing detuning. Based on a polaron master equation approach, which includes electron-phonon interaction nonperturbatively, we derive a fully analytical expression for the spectrum. With respect to detuning dependence, we identify a crossover between the regimes of spectral sideband narrowing or broadening. We also predict regimes of phonon-induced squeezing and anti-squeezing of the spectral resonances. A comparison of the theoretical predictions to detailed experimental studies on the laser detuning-dependence of Mollow triplet resonance emission from single In(Ga)As QDs reveals excellent agreement.