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The dependence of the amplified spontaneous emission on the waveguide excitation length for high quantum efficiency conjugated polymers

机译：高量子效率共轭聚合物的放大自发辐射对波导激发长度的依赖性

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摘要

The waveguide properties of high quantum efficiency thin film of poly(9,9-dioctyl-fluo-rene-2,7-diyI) conjugated polymer has been studied at room temperature. The analysis of the enhancement of the amplified spontaneous emission intensity at different excitation lengths has been performed based on the theoretical method developed by Silvestre et al. (2008) [20]. The increase in the threshold intensity with decreasing excitation length has been experimentally observed. This occurs as a response to the cavity gain in order to overcome the total losses when its length decreases, which represents an important factor to support the gain dependence on the excitation length. Even though highly efficient polymers can reach thresholds at relatively lower intensities because the losses are more easily overcome, the observed intensity behavior of the amplified spontaneous emission can only be explained assuming a gain dependence on the excitation length.
机译：在室温下研究了聚（9,9-二辛基-氟-烯-2,7-diyI）共轭聚合物的高量子效率薄膜的波导特性。根据Silvestre等人开发的理论方法，对不同激发长度下放大的自发发射强度的增强进行了分析。 （2008）[20]。通过实验观察到阈值强度随激励长度的减小而增加。这是对腔增益的响应，以便克服其长度减小时的总损耗，这是支持增益依赖于激励长度的重要因素。尽管由于损耗更容易克服，高效聚合物可以在相对较低的强度下达到阈值，但是仅在假设增益依赖于激励长度的情况下，才能解释观察到的放大自发发射的强度行为。

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  • 来源
    《Organic Electronics》 |2011年第7期|p.1142-1145|共4页
  • 作者

    K.N. Bourdakos; L.A. Cury; A.P. Monkman;

  • 作者单位

    Department of Physics, University of Durham, South Road, Durham DM 3LE, UK;

    Department of Physics, University of Durham, South Road, Durham DM 3LE, UK,Departamento de Fi sica, Institute de Ciencias Exatas, Universidade Federal de Minas Cerais, 31270-901 Belo Horizonte, Minas Gerais, Brazil;

    Department of Physics, University of Durham, South Road, Durham DM 3LE, UK;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    amplified spontaneous emission; thin film waveguides; conjugated polymers;

    机译：自发发射放大;薄膜波导;共轭聚合物;

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