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Two-dimensional spectroscopy: An approach to distinguish Foerster and Dexter transfer processes in coupled nanostructures

机译:二维光谱:一种在耦合纳米结构中区分Foerster和Dexter转移过程的方法

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摘要

The linear and two-dimensional coherent optical spectra of Coulomb-coupled quantum emitters are discussed with respect to the underlying coupling processes. We present a theoretical analysis of the two different resonance energy transfer mechanisms between coupled nanostructures: Forster and Dexter interaction. Our investigation shows that the features visible in optical spectra of coupled quantum dots can be traced back to the nature of the underlying coupling mechanism (Forster or Dexter). Therefore, we discuss how the excitation transfer pathways can be controlled by choosing particular laser polarizations and mutual orientations of the quantum emitters in coherent two-dimensional spectroscopy. In this context, we analyze to what extent the delocalized double-excitonic states are bound to the optical selection rules of the uncoupled system.
机译:关于潜在的耦合过程,讨论了库仑耦合的量子发射器的线性和二维相干光谱。我们对耦合的纳米结构之间的两种不同的共振能量转移机制进行了理论分析:Forster和Dexter相互作用。我们的研究表明,耦合量子点光谱中可见的特征可以追溯到基础耦合机制(Forster或Dexter)的性质。因此,我们讨论在相干二维光谱学中如何通过选择特定的激光偏振和量子发射体的相互取向来控制激发转移途径。在这种情况下,我们分析了离域双激子态在多大程度上与未耦合系统的光学选择规则相关。

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  • 来源
    《Physical review》 |2015年第15期|155313.1-155313.11|共11页
  • 作者单位

    Institut fuer Theoretische Physik, Nichtlineare Optik und Quantenelektronik, Technische Universitaet Berlin, Hardenbergstr. 36, EW 7-1, 10623 Berlin, Germany;

    Institut fuer Theoretische Physik, Nichtlineare Optik und Quantenelektronik, Technische Universitaet Berlin, Hardenbergstr. 36, EW 7-1, 10623 Berlin, Germany;

    Institut fuer Theoretische Physik, Nichtlineare Optik und Quantenelektronik, Technische Universitaet Berlin, Hardenbergstr. 36, EW 7-1, 10623 Berlin, Germany;

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

    semiconductors; quantum dots;

    机译:半导体;量子点;

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