Gong Junyi, Wang Yue, Liu Sheng, Zeng Pan, Yang Xilu, Liang Rongqing, Ou Qiongrong, Wu Xiang, Zhang Shuyu
Opt Express. 2017 Nov 27;25(24):A1154-A1161. doi: 10.1364/OE.25.0A1154.
Halide perovskite materials have rapidly emerged as outstanding optoelectronic materials for solar cells, light-emitting diodes (LEDs), and lasers. Compared to hybrid organic-inorganic perovskites, all-inorganic perovskites have shown unique merits that may contribute to the ultimate goal of developing electrically-pumped lasers. In this paper, we demonstrate a distributed feedback (DFB) resonator using an all-inorganic perovskite thin film as the gain medium. The film has a gain coefficient of 161.1 cm and a loss coefficient of 30.9 cm. Excited by picosecond pulses, the microstructured all-inorganic perovskite film exhibits a single-mode emission at 654 nm with a threshold of 33 μJ/cm. The facile fabrication process provides a promising route towards low-cost single-mode visible lasers for many practical applications.
卤化物钙钛矿材料已迅速成为用于太阳能电池、发光二极管（LED）和激光器的杰出光电器件材料。与有机-无机杂化钙钛矿相比，全无机钙钛矿已展现出独特的优点，这可能有助于实现开发电泵浦激光器的最终目标。在本文中，我们展示了一种使用全无机钙钛矿薄膜作为增益介质的分布反馈（DFB）谐振器。该薄膜的增益系数为161.1 cm，损耗系数为30.9 cm。在皮秒脉冲激发下，微结构全无机钙钛矿薄膜在654 nm处呈现单模发射，阈值为33 μJ/cm。这种简便的制造工艺为许多实际应用提供了一条通往低成本单模可见激光器的有前景的途径。
