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首页> 外文期刊>Physical review >Electrical excitation of microcavity polaritons by radiative pumping from a weakly coupled organic semiconductor
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Electrical excitation of microcavity polaritons by radiative pumping from a weakly coupled organic semiconductor

机译：通过弱耦合有机半导体的辐射泵浦对微腔极化子进行电激发

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Grant H. Lodden;Russell J. Holmes;%In an organic semiconductor, the population of microcavity polariton states occurs via an uncoupled exciton reservoir. Consequently, this results in the inefficient excitation of the upper polariton branch, and a significant population of uncoupled excitons in the active material. Here, an alternate excitation approach is demonstrated that permits the direct population of microcavity polariton states under both electrical and optical excitation without first forming an exciton reservoir. This is realized by introducing a weakly coupled emitter into an optical microcavity containing an organic semiconductor suitable for strong exciton-photon coupling. In contrast to previous work on microcavity polariton luminescence in organic semiconductors, angle-resolved measurements of the photoluminescence and electroluminescence show variations in upper and lower branch emission intensity consistent with the branch photon character. These results confirm that the excitation of the microcavity polariton states is by radiative pumping from the weakly coupled emitter.
机译：Grant H. Lodden; Russell J. Holmes;％在有机半导体中，微腔极化态的种群通过未耦合的激子储集层发生。因此，这导致上极化子分支的激发效率低下，并且活性材料中大量未偶合的激子。在这里，演示了一种替代的激发方法，该方法允许在电和光激发下直接填充微腔极化子态，而无需先形成激子储库。这是通过将微弱耦合的发射器引入包含适合于强激子-光子耦合的有机半导体的光学微腔中实现的。与先前关于有机半导体中的微腔极化子发光的工作相反，光致发光和电致发光的角分辨测量显示出与支路光子特性一致的上，下支路发射强度的变化。这些结果证实，微腔极化态的激发是通过弱耦合发射器的辐射泵浦实现的。

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