Single-mode lasing and 3D confinement from perovskite micro-cubic cavity
Single-mode lasing and 3D confinement from perovskite micro-cubic cavity
复制标题
钙钛矿微立方腔的单模激光和 3D 限制
DOI：
10.1039/c8tc03543a
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发表时间：
2018
影响因子：
6.4
通讯作者：
Zhang Long
中科院分区：
文献类型：
--
作者：
Zhou Beier;Dong Hongxing;Jiang Mingming;Zheng Weihao;Sun Liaoxin;Zhao Binbin;Tang Bing;Pan Anlian;Zhang Long
获得具有优异稳定性和光束质量的单模激光是非常可取的，但仍然具有挑战性。微血小板光学腔由于具有方向性和高输出光功率等重要激光特性而备受关注，但其光约束较弱，制约了单模激光器的应用。在这里，我们适当地增加了微血小板腔的垂直厚度，以实现CsPbBr3微立方腔中的三维光约束，在室温下成功地实现了极窄线宽0.064 nm （Q ~ 8500）的单模激光。此外，制备的微腔具有良好的连续稳定单模激光输出能力。发现了不同生长阶段的孔洞，并分析了相应的生长机制，表明微立方孔洞是由纳米微球演化而来的。此外，在较大的微立方腔中，还观察到具有高阶透射模式的多模激光光谱。这些结果表明，三维CsPbBr3微立方腔提供了更好的光物理性质，对光子器件的基础研究和未来应用具有重要意义。
Obtaining single-mode lasing with excellent stability and beam quality is highly desirable but still challenging. Although microplatelet optical cavities attract great attention because of their important lasing characteristics of directionality and high-power output light, they suffer from weak light confinement, which restricts applications of a single-mode laser. Herein, we increased the vertical thickness of the microplatelet cavity appropriately to achieve 3D light confinement in a CsPbBr3 micro-cubic cavity, from which single-mode lasing with an extreme narrow linewidth of 0.064 nm (Q ∼ 8500) was successfully achieved at room temperature. Besides, the microcavity we prepared exhibits superb capability for the output of continuous stable single-mode lasing. Different growth stages of cavities were found and a related growth mechanism was analyzed, indicating that the micro-cubic cavities evolved from nanospheres. Moreover, interesting multi-mode lasing spectra with higher-order transvers modes were observed in larger micro-cubic cavities. All these results suggest that 3D CsPbBr3 micro-cubic cavities, which provide improved photo-physical properties, are important for fundamental studies and future applications in photonic devices.