Single-mode operation while maintaining a high-quality factor have always been key factors for building high-performance semiconductor lasers. Here, single CsPbBr3 perovskite microwire with a width of ∼3 μm is served as an active microresonator in which a typical single-mode laser output with a quality factor of 3000 is realized through the intrinsic self-absorption effect in success. Simultaneously, we observed the evolution of cavity modes in different dimensional perovskite microresonators and discussed the internal mechanisms of mode evolution and single-mode output in depth. The synergistic effect of intrinsic self-absorption and cavity size is the dominant factor for single-mode lasing output. It provides a feasible approach for the subsequent construction of high-quality electrically pumped single-mode lasers.

中文翻译：

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利用本征自吸收在全无机 CsPbBr3 钙钛矿微丝中实现单模激光

保持高质量因子的单模操作一直是构建高性能半导体激光器的关键因素。在这里，单个 CsPbBr3个宽度为~3 μm的钙钛矿微线用作有源微谐振器，其中通过固有的自吸收效应成功实现了具有3000品质因数的典型单模激光输出。同时，我们观察了不同维度钙钛矿微谐振器中腔模的演化，并深入讨论了模式演化和单模输出的内部机制。本征自吸收和腔体尺寸的协同效应是单模激光输出的主导因素。为后续构建高质量电泵浦单模激光器提供了一种可行的途径。