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Thin films of arylenevinylene oligomers prepared by MAPLE for applications in non-linear optics

机译:MAPLE制备的用于非线性光学的亚芳基亚乙烯基低聚物薄膜

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摘要

This paper discusses two arylenevinylene oligomers with optical nonlinear properties. Their trans molecular structure was confirmed by Fourier Transform Infrared Spectroscopy and Nuclear Magnetic Resonance. Second Harmonic Generation and two-photon fluorescence have been observed on Matrix Assisted Pulsed Laser Evaporation-deposited thin films. We have seen two local maxima in UV-Vis spectra and a red shift of the photoluminescence peak for carbazole-based oligomer, which can be correlated with a higher conformational flexibility and with strong polarization interactions in the solid state. Scanning Electron Microscopy and Atomic Force Microscopy images have revealed a grainy morphology of the film deposited on titanium and a higher roughness for carbazole-based oligomer. Second harmonic measurements have shown nearly equal values of the second-order nonlinear optical coefficient for the triphenylamine and carbazole-based oligomers for P_(laser)< 100 mW. z-Scan and x-scan representations of the carbazole-based oligomer film have shown strong two-photon fluorescence intensity inside the sample confirming a volume process, and a strong second harmonic at the surface of the sample determined by the surface morphology.
机译:本文讨论了具有光学非线性特性的两种亚芳基亚乙烯基低聚物。通过傅立叶变换红外光谱和核磁共振证实了它们的反式分子结构。在基质辅助脉冲激光蒸发沉积薄膜上已观察到二次谐波产生和双光子荧光。我们已经看到了咔唑基低聚物在紫外-可见光谱中的两个局部最大值和光致发光峰的红移,这与较高的构象柔韧性和固态的强极化相互作用有关。扫描电子显微镜和原子力显微镜图像已经揭示了沉积在钛上的膜的颗粒状形态,以及咔唑基低聚物的粗糙度更高。二次谐波测量显示,对于P_(激光)<100 mW,三苯胺和咔唑基低聚物的二阶非线性光学系数几乎相等。咔唑基低聚物薄膜的z扫描和x扫描表示法显示了样品内部的强双光子荧光强度,从而确定了体积过程,并且在样品表面上通过表面形态确定了强的二次谐波。

著录项

  • 来源
    《Applied Surface Science》 |2011年第12期|p.5298-5302|共5页
  • 作者单位

    National Institute of Materials Physics, Optics and Spectroscopy Laboratory, 105 bis Atomistilor Street, P.O. Box MG-7, Bucharest-Magurele 077125, Romania;

    P. Poni Institute of Macromolecular Chemistry, 41 A Cr. Chica Voda Alley, 700487 lasi, Romania;

    P. Poni Institute of Macromolecular Chemistry, 41 A Cr. Chica Voda Alley, 700487 lasi, Romania;

    National Institute of Materials Physics, Optics and Spectroscopy Laboratory, 105 bis Atomistilor Street, P.O. Box MG-7, Bucharest-Magurele 077125, Romania;

    National Institute for Laser, Plasma and Radiation Physics, Str. Atomistilor, Nr. 409, P.O. Box MG-36, Magurele, Bucharest 077125, Romania;

    Faculty of Physics, University of Bucharest, Str. Atomistilor nr.405, P.O. Box MG-17, Bucharest-Magurele 077125, Romania;

    National Institute of Materials Physics, Optics and Spectroscopy Laboratory, 105 bis Atomistilor Street, P.O. Box MG-7, Bucharest-Magurele 077125, Romania;

    National Institute of Materials Physics, Optics and Spectroscopy Laboratory, 105 bis Atomistilor Street, P.O. Box MG-7, Bucharest-Magurele 077125, Romania;

    Faculty of Physics, University of Bucharest, Str. Atomistilor nr.405, P.O. Box MG-17, Bucharest-Magurele 077125, Romania;

    Laboratoire de Photonique d'Angers, Universite d'Angers, 2, Bd. Lavoisier, 49045 Angers, France;

    National Institute for Laser, Plasma and Radiation Physics, Str. Atomistilor, Nr. 409, P.O. Box MG-36, Magurele, Bucharest 077125, Romania;

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

    maple; arylenevinylene oligomers; shg; optical properties;

    机译:枫;亚芳基亚乙烯基低聚物;SHG;光学性质;

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