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Whispering Gallery Mode Lasing from Perovskite Polygonal Microcavities via Femtosecond Laser Direct Writing
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2021-04-01 , DOI: 10.1021/acsami.0c21824 Xiaoyu Tian 1 , Lin Wang 2 , Wei Li 3 , Qianqian Lin 3 , Qiang Cao 1
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2021-04-01 , DOI: 10.1021/acsami.0c21824 Xiaoyu Tian 1 , Lin Wang 2 , Wei Li 3 , Qianqian Lin 3 , Qiang Cao 1
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Organic–inorganic halide perovskites have excellent intrinsic properties, such as long carrier lifetime, high photoluminescence quantum yield, and high gain, in whispering gallery mode (WGM) cavities by facile vapor self-assembly or solution process, which make them competitive for high-performance microlasers. However, the performance of perovskite-based microlasers is severely limited by the fabrication of microcavities, which results in poor reproducibility and uncontrolled morphology. Herein, we explore a reproducible method which combined thermal co-evaporation with femtosecond (fs) laser direct writing for formamidinium lead iodide (FAPbI3) perovskite polygon-shaped WGM microcavities. The microlasers pumped with the fs laser had a low threshold of 4.0–12.3 μJ/cm2 and narrow full width at half-maximum of 0.62–1.05 nm. Moreover, size- and shape-dependent WGM lasing performances are also investigated systematically. The results prove that FAPbI3 polygonal microcavities can serve as promising WGM lasers and have great potential for practical optoelectronic applications.
中文翻译：
通过飞秒激光直接写入从钙钛矿多边形微腔中窃窃私语的画廊模式
有机-无机卤化物钙钛矿具有轻巧的蒸气自组装或固溶过程，在耳语画廊模式（WGM）腔中具有出色的固有特性，例如，较长的载流子寿命，高的光致发光量子产率和高的增益，这使其具有高竞争性。性能微激光器。然而，基于钙钛矿的微激光器的性能受到微腔制造的严重限制，这导致可再现性差和形态不受控制。在这里，我们探索了一种可重复性的方法，该方法将热共蒸发与飞秒（fs）激光直接写入相结合来形成甲ami碘化铅（FAPbI 3）钙钛矿多边形WGM微腔。fs激光泵浦的微激光的阈值较低，为4.0–12.3μJ/ cm 2且在0.62-1.05 nm的一半最大值处具有较窄的全宽。此外，还对与尺寸和形状有关的WGM激光性能进行了系统研究。结果证明，FAPbI 3多边形微腔可以用作有前途的WGM激光器，并在实际的光电应用中具有巨大的潜力。
更新日期：2021-04-14
中文翻译：
通过飞秒激光直接写入从钙钛矿多边形微腔中窃窃私语的画廊模式
有机-无机卤化物钙钛矿具有轻巧的蒸气自组装或固溶过程，在耳语画廊模式（WGM）腔中具有出色的固有特性，例如，较长的载流子寿命，高的光致发光量子产率和高的增益，这使其具有高竞争性。性能微激光器。然而，基于钙钛矿的微激光器的性能受到微腔制造的严重限制，这导致可再现性差和形态不受控制。在这里，我们探索了一种可重复性的方法，该方法将热共蒸发与飞秒（fs）激光直接写入相结合来形成甲ami碘化铅（FAPbI 3）钙钛矿多边形WGM微腔。fs激光泵浦的微激光的阈值较低，为4.0–12.3μJ/ cm 2且在0.62-1.05 nm的一半最大值处具有较窄的全宽。此外，还对与尺寸和形状有关的WGM激光性能进行了系统研究。结果证明，FAPbI 3多边形微腔可以用作有前途的WGM激光器，并在实际的光电应用中具有巨大的潜力。
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