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首页> 外文期刊>Physical review >Excitonic optical transitions characterized by Raman excitation profiles in single-walled carbon nanotubes
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Excitonic optical transitions characterized by Raman excitation profiles in single-walled carbon nanotubes

机译：以单壁碳纳米管中的拉曼激发轮廓为特征的激子光学跃迁

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摘要

We examine the excitonic nature of the E_(33) optical transition of the individual free-standing index-identified (23,7) single-walled carbon nanotube by means of the measurements of its radial-breathing-mode and G-mode Raman excitation profiles. We confirm that it is impossible to determine unambiguously the nature of its E_(33) optical transition (excitonic vs band to band) based only on the excitation profiles. Nevertheless, by combining Raman scattering, Rayleigh scattering, and optical absorption measurements on strictly the same individual (23,7) single-walled carbon nanotube, we show that the absorption, Rayleigh spectra, and Raman excitation profiles of the longitudinal and transverse G modes are best fitted by considering the nature of the E_(33) transition as excitonic. The fit of the three sets of data gives close values of the transition energy E_(33) and damping parameter Γ_(33). This comparison shows that the fit of the Raman excitation profiles provides with good accuracy the energy and damping parameter of the excitonic optical transitions in single-walled carbon nanotubes.
机译：我们通过测量其径向呼吸模式和G模式拉曼激发来研究单个独立指数识别的（23,7）单壁碳纳米管的E_（33）光学跃迁的激子性质。个人资料。我们确认不可能仅根据激发曲线来明确确定其E_（33）光学跃迁的性质（激子与带间）。尽管如此，通过在严格相同的单个（23,7）单壁碳纳米管上结合拉曼散射，瑞利散射和光吸收测量，我们显示出纵向和横向G模式的吸收，瑞利光谱和拉曼激发曲线通过考虑E_（33）跃迁的性质为激子来最好地拟合。三组数据的拟合给出了过渡能量E_（33）和阻尼参数Γ_（33）的近似值。该比较表明，拉曼激发轮廓的拟合为单壁碳纳米管中的激子光学跃迁提供了良好的准确度的能量和阻尼参数。

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  • 来源
    《Physical review》 |2016年第7期|075430.1-075430.6|共6页
  • 作者

    H. N. Tran; J.-C. Blancon; J.-R. Huntzinger; R. Arenal; V. N. Popov; A. A. Zahab; A. Ayari; A. San-Miguel; F. Vallee; N. Del Fatti; J.-L. Sauvajol; M. Paillet;

  • 作者单位

    Labomtoire Charles Coulomb (UMR5221), CNRS-Universite de Montpellier, F-34095 Montpellier, France;

    Institut Lumiere Matiere (UMR5306), CNRS-Universite Lyon 1, Universite de Lyon, F-69622 Villeurbanne, France;

    Labomtoire Charles Coulomb (UMR5221), CNRS-Universite de Montpellier, F-34095 Montpellier, France;

    Laboratorio de Microscopi-as Avanzadas, Instituto de Nanociencia de Aragon, Universidad de Zaragoza, 50018 Zaragoza, Spain,ARAID Foundation, 50018 Zaragoza, Spain;

    Faculty of Physics, University of Sofia, BG-1164 Sofia, Bulgaria;

    Labomtoire Charles Coulomb (UMR5221), CNRS-Universite de Montpellier, F-34095 Montpellier, France;

    Institut Lumiere Matiere (UMR5306), CNRS-Universite Lyon 1, Universite de Lyon, F-69622 Villeurbanne, France;

    Institut Lumiere Matiere (UMR5306), CNRS-Universite Lyon 1, Universite de Lyon, F-69622 Villeurbanne, France;

    Institut Lumiere Matiere (UMR5306), CNRS-Universite Lyon 1, Universite de Lyon, F-69622 Villeurbanne, France;

    Institut Lumiere Matiere (UMR5306), CNRS-Universite Lyon 1, Universite de Lyon, F-69622 Villeurbanne, France;

    Labomtoire Charles Coulomb (UMR5221), CNRS-Universite de Montpellier, F-34095 Montpellier, France;

    Labomtoire Charles Coulomb (UMR5221), CNRS-Universite de Montpellier, F-34095 Montpellier, France;

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