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Phonon mediated off-resonant quantum dot-cavity coupling under resonant excitation of the quantum dot

机译:量子点共振激发下声子介导的非共振量子点-腔耦合

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摘要

We propose a model for phonon-mediated off-resonant quantum dot-cavity coupling and use it to successfully explain recently observed resonant quantum dot spectroscopic results. We explicitly incorporate the effect of phonons, which explains the role of temperature in the coupling mechanism and predicts an asymmetry in the coupling depending on whether the quantum dot is red or blue detuned with respect to the cavity. We show that the off-resonant coupling is enhanced by the cavity; in the absence of such enhancement, the coupling strength is greatly diminished at higher dot-cavity detunings. These results demonstrate that phonon-mediated processes effectively extend the detuning range in which off-resonant QD-cavity coupling may occur beyond that given by pure dephasing processes.
机译:我们提出了一种声子介导的非共振量子点-腔耦合模型,并用它来成功解释最近观察到的共振量子点光谱结果。我们明确结合了声子的作用,这解释了温度在耦合机制中的作用,并根据量子点相对于腔是失谐的量子点是红色还是蓝色失谐,预测了耦合中的不对称性。我们表明,谐振腔的耦合会增强。在没有这种增强的情况下,点腔失谐较高时,耦合强度会大大降低。这些结果表明,声子介导的过程有效地扩展了失谐范围,在该失谐范围内,可能发生的非谐振QD腔耦合超出了纯相移过程所给出的范围。

著录项

  • 来源
    《Physical review》 |2011年第8期|p.085309.1-085309.7|共7页
  • 作者单位

    E. L. Ginzton Laboratory, Stanford University, Stanford, California 94305, USA;

    E. L. Ginzton Laboratory, Stanford University, Stanford, California 94305, USA;

    E. L. Ginzton Laboratory, Stanford University, Stanford, California 94305, USA;

    E. L. Ginzton Laboratory, Stanford University, Stanford, California 94305, USA;

    E. L. Ginzton Laboratory, Stanford University, Stanford, California 94305, USA;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    quantum dots; cavity quantum electrodynamics; micromasers; quantum wells;

    机译:量子点;腔量子电动力学微型激光器量子阱;

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