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Gain properties of dye-doped polymer thin films

机译：染料掺杂的聚合物薄膜的增益特性

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摘要

Hybrid pumping appears as a promising compromise in order to reach the much coveted goal of an electrically pumped organic laser. In such configuration the organic material is optically pumped by an electrically pumped inorganic device on a chip. This engineering solution requires therefore an optimization of the organic gain medium under optical pumping. Here, we report a detailed study of the gain features of dye-doped polymer thin films. In particular we introduce the gain efficiency K, in order to facilitate comparison between different materials and experimental conditions. The gain efficiency was measured with a variety of experimental methods (pump-probe amplification, variable stripe length method, laser thresholds) in order to study several factors which modify the actual gain of a layer, namely the confinement factor, the pump polarization, the molecular anisotropy, and the re-absorption. For instance, for a 600-nm-thick 5-wt % DCM doped poly(methyl methacrylate) (PMMA) layer, the different experimental approaches give a consistent value of K approx= 80-cmMW~(-1). On the contrary, the usual model predicting the gain from the characteristics of the material leads to an overestimation by two orders of magnitude, which raises a serious problem in the design of actual devices. In this context, we demonstrate the feasibility to infer the gain efficiency from the laser threshold of well-calibrated devices. Temporal measurements at the picosecond scale were carried out to support the analysis.
机译：混合泵浦似乎是一个有前途的折衷方案，目的是实现电动泵浦有机激光器这一令人垂涎的目标。在这样的配置中，有机材料通过电泵浦的无机器件被光学地泵浦在芯片上。因此，该工程解决方案需要优化光泵浦下的有机增益介质。在这里，我们报告了对染料掺杂的聚合物薄膜的增益特性的详细研究。特别是，我们引入了增益效率K，以便于在不同材料和实验条件之间进行比较。增益效率通过多种实验方法（泵浦探针放大，可变条纹长度方法，激光阈值）进行测量，以研究修改层实际增益的几个因素，即限制因素，泵浦极化，分子各向异性，并重新吸收。例如，对于厚度为600 nm的5 wt％DCM掺杂的聚（甲基丙烯酸甲酯）（PMMA）层，不同的实验方法得出的一致值K约为80-cmMW〜（-1）。相反，从材料特性预测增益的常用模型会导致高估两个数量级，这在实际器件的设计中引起了严重的问题。在这种情况下，我们展示了从校准良好的设备的激光阈值推断增益效率的可行性。进行了皮秒级的时间测量以支持分析。

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  • 来源
    《Physical review》 |2015年第21期|214202.1-214202.14|共14页
  • 作者

    I. Gozhyk; M. Boudreau; H. Rabbani Haghighi; N. Djellali; S. Forget; S. Chenais; C. Ulysse; A. Brosseau; R. Pansu; J.-F. Audibert; S. Gauvin; J. Zyss; M. Lebental;

  • 作者单位

    Laboratoire de Photonique Quantique et Moleculaire, ENS Cachan, CentraleSupelec, CNRS, Universite Paris-Saclay, 94235 Cachan, France,Surface du Verre et Interfaces, UMR 125 CNRS/Saint-Gobain Recherche, 39 quai Lucien Lefranc, 93303 Aubervilliers, France;

    Laboratoire de Photonique Quantique et Moleculaire, ENS Cachan, CentraleSupelec, CNRS, Universite Paris-Saclay, 94235 Cachan, France,Groupe de Recherche sur les Couches Minces et la Photonique, Departement de Physique et d'Astronomie, Universite de Moncton, Moncton, New Brunswick, Canada E1A 3E9;

    Laboratoire de Physique des Lasers, Universite Paris 13 and CNRS UMR 7538, 99 Avenue Jean-Baptiste Clement, F-93430 Villetaneuse, France;

    Laboratoire de Photonique Quantique et Moleculaire, ENS Cachan, CentraleSupelec, CNRS, Universite Paris-Saclay, 94235 Cachan, France;

    Laboratoire de Physique des Lasers, Universite Paris 13 and CNRS UMR 7538, 99 Avenue Jean-Baptiste Clement, F-93430 Villetaneuse, France;

    Laboratoire de Physique des Lasers, Universite Paris 13 and CNRS UMR 7538, 99 Avenue Jean-Baptiste Clement, F-93430 Villetaneuse, France;

    Laboratoire de Photonique et Nanostructures, CNRS UPR20, Route de Nozay, F-91460 Marcoussis, France;

    Laboratoire de Photophysique et Photochimie Supramoleculaires et Macromoleculaires, CNRS UMR 8531, Institut d'Alembert FR 3242, Ecole Normale Superieure de Cachan, F-94235 Cachan, France;

    Laboratoire de Photophysique et Photochimie Supramoleculaires et Macromoleculaires, CNRS UMR 8531, Institut d'Alembert FR 3242, Ecole Normale Superieure de Cachan, F-94235 Cachan, France;

    Laboratoire de Photophysique et Photochimie Supramoleculaires et Macromoleculaires, CNRS UMR 8531, Institut d'Alembert FR 3242, Ecole Normale Superieure de Cachan, F-94235 Cachan, France;

    Groupe de Recherche sur les Couches Minces et la Photonique, Departement de Physique et d'Astronomie, Universite de Moncton, Moncton, New Brunswick, Canada E1A 3E9;

    Laboratoire de Photonique Quantique et Moleculaire, ENS Cachan, CentraleSupelec, CNRS, Universite Paris-Saclay, 94235 Cachan, France;

    Laboratoire de Photonique Quantique et Moleculaire, ENS Cachan, CentraleSupelec, CNRS, Universite Paris-Saclay, 94235 Cachan, France;

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  • 正文语种 eng
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  • 关键词

    microcavity and microdisk lasers; dye lasers; resonators, cavities, amplifiers, arrays, and rings; visible spectra;

    机译：微腔和微盘激光器;染料激光器;谐振器;空腔;放大器;阵列和环;可见光谱;

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