Single-mode micro-laser plays an important role in optoelectronic applications, such as photonic integration, optical communication and biological detection. Reducing cavity size is a facile method to operate single-mode but it is along with some problems such as heavy optical loss, high threshold and low-quality factor. In this work, proper sized single crystal CsPbBr₃ microdisks with excellent morphology and high stability was synthesized and selected to obtain the single-mode lasing. Furthermore, surface plasmon of detachable Pt nanoparticles (NPs) was introduced on the microcavity to improve the lasing performance. Low threshold (~133.9 μJ/cm²) and high quality (Q) factor (~3950) of the CsPbBr₃ single-mode micro-laser were realized through plasmon coupling.

单模微激光器在光子集成，光通信和生物检测等光电应用中起着重要作用。减小腔体尺寸是一种操作单模的简便方法，但是它也伴随着一些问题，例如严重的光学损耗，高阈值和低品质因数。在这项工作中，具有良好的形态和高稳定性的适当大小的单晶CsPbBr ₃微型磁盘被合成并选择以获得单模激光。此外，在微腔上引入了可分离的Pt纳米颗粒（NPs）的表面等离激元，以提高激光性能。CsPbBr _3的低阈值（〜133.9μJ/ cm ²）和高质量（Q）因子（〜3950） 通过等离激元耦合实现了单模微激光器。