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Periodically-pumped organic microlasers

定期泵浦有机微型激光器

基本信息

批准号：
236150641
负责人：
Professor Dr. Karl Leo
金额：
--
依托单位：
Professur für Optoelektronik
依托单位国家：
德国
项目类别：
Research Grants
财政年份：
2013
资助国家：
德国
起止时间：
2012-12-31 至 2016-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/236150641?language=en
关键词：
Periodically pumped organic microlasers

项目摘要

In this project, we propose the experimental and theoretical investigation of localised quasimodes and the formation of supermodes in planar microcavities having an organic active medium. To this end, the planar organic microcavities shall be excited in a spatially inhomogeneous fashion, to induce a spatial modulation of the distributions of gain and absorption within the organic cavity layer. A major effort will be put on the experiments which use an interference patterns for periodic optical pumping of organic microcavities. In this case, our preliminar results show that the coherence may extend in-plane over the entire pump pattern and is not restricted anymore by the mode volume of the microcavity, which is mutual to the planar structures and is typically very small. This observation is of crucial importance for the future applications which will involve a periodic electrical pumping of organic microcavity lasers. First of all it shows, that the lasing volume may be extended due to the in-plane propagation of the coherence, which might lead to much higher emission powers of a single-mode organic laser. Secondly, since discretization of the in-plane vector leads to an oblique emission with respect to the normal of mirrors, so that the propagation vector for the coherent light does not concide anymore with the electric current flow. This decoupling of the optical flow from the electrical excitation reduces the influence of the contacts and currents, which are parasitic and degrade laser performance and characteristics.The aim of the project is to obtain a basic understanding of spatially coherent processes in a planar microcavity, and to develop the ability to manipulate these processes. In contrast to the direct incorporation of different structures into the cavity layer or even physical structuring of this layer, the use of the periodic optical pumping offers an incomparable flexibility in the experiments. It allows both to optimize these structures for the future incorporation of e.g. metal contacts and also to obtain a deeper understanding of the fundamental physics of microcavity lasers.

在这个项目中，我们提出了对局域准模以及具有有机活性介质的平面微腔中超模的形成进行实验和理论研究。为此，平面有机微腔将以空间不均匀的方式被激励，以引起有机腔层内增益和吸收分布的空间调制。将主要精力放在使用干涉图案对有机微腔进行周期性光泵浦的实验上。在这种情况下，我们的初步结果表明，相干性可以在整个泵浦图案上在平面内延伸，并且不再受到微腔的模式体积的限制，微腔的模式体积与平面结构是相互的，并且通常非常小。这一观察结果对于涉及有机微腔激光器的周期性电泵浦的未来应用至关重要。首先，它表明，由于相干性的面内传播，激光体积可能会扩大，这可能会导致单模有机激光器具有更高的发射功率。其次，由于面内矢量的离散化导致相对于镜子法线的倾斜发射，因此相干光的传播矢量不再与电流一致。这种光流与电激发的解耦减少了接触和电流的影响，这些影响是寄生的，会降低激光器的性能和特性。该项目的目的是获得对平面微腔中空间相干过程的基本了解，并发展操纵这些过程的能力。与将不同结构直接并入腔层甚至该层的物理结构相比，周期性光泵浦的使用在实验中提供了无与伦比的灵活性。它允许双方优化这些结构，以便将来合并。金属接触，还可以更深入地了解微腔激光器的基础物理。