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Oscillatory dynamics of nonequilibrium dissipative exciton-polariton condensates in weak-contrast lattices

机译：弱对比度晶格中非平衡耗散激子-极化子凝聚的振荡动力学

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摘要

We study the nonlinear dynamics of exciton polaritons in an incoherently pumped semiconductor microcavity with an embedded weak-contrast lattice and coupled to an exciton reservoir. We elucidate fundamental features of nonequilibrium exciton-polariton condensates trapped in one-dimensional periodic potentials both in the vicinity of zero momentum (so-called "zero-momentum state") and at the boundaries of Brillouin zone ("π states"). Within the framework of the mean-field theory, we identify different regimes of both relaxation and oscillatory dynamics governed by superpositions of Bloch eigenstates of coherent exciton polaritons within the periodic lattice. In particular, we theoretically demonstrate stable macroscopic oscillations, akin to nonlinear Josephson oscillations, between different spectral components of the polariton condensate in the momenta space. We discuss a strong influence of dissipative effects and the feedback induced by the inhomogeneity of the incoherent reservoir on the dynamics of coherent polaritons.
机译：我们研究了非相干抽运的半导体微腔中的激子极化子的非线性动力学，该微腔具有嵌入的弱对比度晶格并耦合到激子储层。我们阐明了在零动量附近（所谓的“零动量态”）和在布里渊区的边界（“π态”）处陷于一维周期性电势中的非平衡激子-极化子凝聚的基本特征。在均场理论的框架内，我们确定了周期性晶格内相干激子极化子的Bloch本征态的​​叠加所控制的弛豫和振荡动力学的不同状态。特别是，我们从理论上证明了动量空间中极化子冷凝物的不同光谱成分之间类似于非线性约瑟夫森振动的稳定宏观振动。我们讨论了耗散效应和非相干储层不均匀性引起的反馈对相干极化子动力学的强烈影响。

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  • 来源
    《Physical review》 |2015年第21期|214301.1-214301.9|共9页
  • 作者

    X. Ma; I. Yu. Chestnov; M. V. Charukhchyan; A. P. Alodjants; O. A. Egorov;

  • 作者单位

    Institute of Condensed Matter Theory and Solid State Optics, Abbe Center of Photonics, Friedrich-Schiller-Universitaet Jena, Max-Wien-Platz 1, 07743 Jena, Germany;

    Department of Physics and Applied Mathematics, Vladimir State University named after A. G. and N. G. Stoletovs, 87 Gorkii St., 600000 Vladimir, Russia;

    Department of Physics and Applied Mathematics, Vladimir State University named after A. G. and N. G. Stoletovs, 87 Gorkii St., 600000 Vladimir, Russia;

    Department of Physics and Applied Mathematics, Vladimir State University named after A. G. and N. G. Stoletovs, 87 Gorkii St., 600000 Vladimir, Russia ,National Research University for Information Technology, Mechanics and Optics (ITMO), St. Petersburg 197101, Russia;

    Institute of Condensed Matter Theory and Solid State Optics, Abbe Center of Photonics, Friedrich-Schiller-Universitaet Jena, Max-Wien-Platz 1, 07743 Jena, Germany;

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  • 关键词

    polaritons (including photon-phonon and photon-magnon interactions); exciton-mediated interactions; dynamic properties of condensates; collective and hydrodynamic excitations, superfluid flow;

    机译：极化子（包括光子-声子和光子-磁子相互作用）;激子介导的相互作用;冷凝物的动态特性;集体和流体动力激励;超流;

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