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20 August 2020 Temperature dependence of lasing threshold in organic TDAF polariton condensation
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We investigate the temperature dependence (from 16 K to 300 K) of an organic polariton laser, consisting of an amorphous organic semiconductor thin film in a planar microcavity. The polariton lasing threshold does not change between 45 K and room temperature, but increases when the temperature decreases below 45 K. This is accompanied by an energy relaxation bottleneck along the lower polariton branch at the lower temperature. This temperature dependence behavior is attributed to the competition between direct radiative pumping from exciton reservoir and phonon-induced relaxation at different temperature and explains the anomalously high thresholds in organic lasers.
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Shaocong Hou, Yue Qu, and Stephen R. Forrest "Temperature dependence of lasing threshold in organic TDAF polariton condensation", Proc. SPIE 11473, Organic and Hybrid Light Emitting Materials and Devices XXIV, 114730Y (20 August 2020);


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