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首页> 外文期刊>Physical Review. B, Condensed Matter >Microscopic theory of cavity-enhanced single-photon emission from optical two-photon Raman processes
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Microscopic theory of cavity-enhanced single-photon emission from optical two-photon Raman processes

机译：光学双光子拉曼过程中腔增强单光子发射的微观理论

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摘要

We consider cavity-enhanced single-photon generation from stimulated two-photon Raman processes in three-level systems. We compare four fundamental system configurations, one ∧-, one V-, and two ladder (E-) configurations. These can be realized as subsystems of a single quantum dot or of quantum-dot molecules. For a new microscopic understanding of the Raman process, we analyze the Heisenberg equation of motion applying the cluster-expansion scheme. Within this formalism an exact and rigorous definition of a cavity-enhanced Raman photon via its corresponding Raman correlation is possible. This definition for example enables us to systematically investigate the on-demand potential of Raman-transition-based single-photon sources. The four system arrangements can be divided into two subclasses, A-type and V-type, which exhibit strongly different Raman-emission characteristics and Raman-emission probabilities. Moreover, our approach reveals whether the Raman path generates a single photon or just induces destructive quantum interference with other excitation paths. Based on our findings and as a first application, we gain a more detailed understanding of experimental data from the literature. Our analysis and results are also transferable to the case of atomic three-level-resonator systems and can be extended to more complicated multilevel schemes.
机译：我们考虑了在三能级系统中由受激二光子拉曼过程产生的腔增强单光子产生。我们比较了四种基本的系统配置，一种∧-，一种V-和两种梯形（E-）配置。这些可以实现为单个量子点或量子点分子的子系统。为了获得对拉曼过程的新的微观理解，我们使用簇扩展方案分析了海森堡运动方程。在这种形式主义中，可以通过其相应的拉曼相关性对腔增强的拉曼光子进行精确而严格的定义。例如，此定义使我们能够系统地研究基于拉曼跃迁的单光子源的按需潜力。四个系统布置可以分为两个子类，即A型和V型，这两个子类表现出非常不同的拉曼发射特性和拉曼发射概率。此外，我们的方法揭示了拉曼路径是产生单个光子还是仅引起与其他激发路径的破坏性量子干涉。基于我们的发现和首次应用，我们从文献中获得了对实验数据的更详细的了解。我们的分析和结果也可以转移到原子三级谐振器系统的情况，并且可以扩展到更复杂的多级方案。

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  • 来源
    《Physical Review. B, Condensed Matter》 |2018年第12期|125303.1-125303.14|共14页
  • 作者

    Dominik Breddermann; Tom Praschan; Dirk Heinze; Rolf Binder; Stefan Schumacher;

  • 作者单位

    Department of Physics and Center for Optoelectronics and Photonics Paderbom (CeOPP), Paderborn University, Warburger Strasse 100, 33098 Paderborn, Germany;

    Department of Physics and Center for Optoelectronics and Photonics Paderbom (CeOPP), Paderborn University, Warburger Strasse 100, 33098 Paderborn, Germany;

    Department of Physics and Center for Optoelectronics and Photonics Paderbom (CeOPP), Paderborn University, Warburger Strasse 100, 33098 Paderborn, Germany;

    College of Optical Sciences, University of Arizona, Tucson, Arizona 85721, USA;

    Department of Physics and Center for Optoelectronics and Photonics Paderbom (CeOPP), Paderborn University, Warburger Strasse 100, 33098 Paderborn, Germany,College of Optical Sciences, University of Arizona, Tucson, Arizona 85721, USA;

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