The features of spontaneous and stimulated emission of polyfluorenes, polyvinylcarbazole, and low-molecular-weight electron-donor compounds incorporated into various materials are studied in the presence of nitrotoluene vapour. Lasing in planar thin-film waveguides is achieved. The dynamics of the lasing spectra of a thin-film optical chemical sensor is presented. It is shown that the response time of the sensor in the lasing regime is 30 s before the lasing intensity decreases by 50% from the initial level.

中文翻译：

---

在硝基甲苯蒸气存在下薄膜聚合物结构的自发和受激发射

在硝基甲苯蒸气存在下研究了掺入各种材料中的聚芴、聚乙烯咔唑和低分子量电子给体化合物的自发和受激发射特征。实现了平面薄膜波导中的激光发射。介绍了薄膜光学化学传感器的激光光谱动力学。结果表明，在激光强度从初始水平降低 50% 之前，传感器在激光状态下的响应时间为 30 秒。