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Spectral dependence of nonlinear absorption and refraction in terthiophene-based organic semiconductors

机译:对噻吩基有机半导体中非线性吸收和折射的光谱依赖性

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摘要

We present results related to the determination of third-order nonlinear optical (NLO) properties of three organic semiconductors (OSCs) with a π-conjugated terthiophene (3Th) core and symmetrically or asymmetrically end-capped with specific terminals. The spectral dependences of the real and imaginary part of the cubic hyperpolarizability γ were obtained from Z-scan studies in the 600-1200 nm range. The 3Th-based OSCs show only moderate nonlinear absorption at twice the wavelength of the main one-photon absorption peaks (~750 nm) but appreciable two-photon absorption cross sections (σ_2≈ 120 GM) close to 600 nm.
机译:我们提出的结果与确定具有π共轭对噻吩(3Th)核并且对称或不对称封端带有特定端子的三种有机半导体(OSC)的三阶非线性光学(NLO)特性有关。立方超极化率γ的实部和虚部的光谱相关性是通过在600-1200 nm范围内的Z扫描研究获得的。基于3Th的OSC在一个单光子吸收峰的主波长(〜750 nm)的两倍波长处仅显示出适度的非线性吸收,但在接近600 nm的情况下却出现了可观的两光子吸收截面(σ_2≈120GM)。

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  • 来源
    《Optical Materials》 |2012年第10期|p.1682-1685|共4页
  • 作者单位

    Institute of Physical and Theoretical Chemistry Wroclaw University of Technology Wybrzeze Wyspianskiego 27 50-370 Wroclaw Poland Laboratoire de Chimie des Polymeres Universite Pierre et Marie Curie-Paris VI 3 Rue Galilee 94200 Ivry-sur-Seine France;

    Institute of Physical and Theoretical Chemistry Wroclaw University of Technology Wybrzeze Wyspianskiego 27 50-370 Wroclaw Poland Laboratoire de photonique quantique et moleculaire Ecole Normale Superieure de Cachan 61 avenue du President Wilson. 94235 Cachan Cedex France;

    Institute of Physical and Theoretical Chemistry Wroclaw University of Technology Wybrzeze Wyspianskiego 27 50-370 Wroclaw Poland;

    Laboratoire de Chimie des Polymeres Universite Pierre et Marie Curie-Paris VI 3 Rue Galilee 94200 Ivry-sur-Seine France;

    UMR5819-SPrAM (CEA/CNRS Univ.J. Fourier-Crennoble I) Institut Nanosciences et Croyogenie (INAC) CEA-Grenoble 17 Rue des Martyrs 38054 Grenoble Cedex 9 France;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Z-scan; hyperpolarizability; two-photon absorption; organic semiconductors; π-conjugated materials;

    机译:Z扫描超极化性双光子吸收有机半导体;π共轭材料;

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