Single-Mode Lasers Based on Cesium Lead Halide Perovskite Submicron Spheres
Single-Mode Lasers Based on Cesium Lead Halide Perovskite Submicron Spheres
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基于铯铅卤化物钙钛矿亚微米球的单模激光器
DOI：
10.1021/acsnano.7b04496
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发表时间：
2017
期刊：
影响因子：
17.1
通讯作者：
Zhang Long
中科院分区：
文献类型：
--
作者：
Tang Bing;Dong Hongxing;Sun Liaoxin;Zheng Weihao;Wang Qi;Sun Fangfang;Jiang Xiongwei;Pan Anlian;Zhang Long
在室温下，在铯铅卤化钙钛矿亚微米球中实现了单模激光。采用双源化学气相沉积法制备了尺寸可调（0.2 ~ 10 μm）的全无机卤化铯铅（CsPbX3, X = Cl, Br， I）微球。由于微球表面光滑，几何结构规则，耳语廊谐振模式使得激光在亚微米球内实现单模激光。令人惊讶的是，在cspbx3球形腔中成功地实现了极窄线宽（~ 0.09 nm）的单模激光器，具有低阈值（~ 0.42 μJ cm-2）和高腔质量因子（~ 6100），这是迄今为止报道的所有天然纳米/微腔中激光模式的最佳规格。通过调制卤化物成分和微球的尺寸，单模激光器的波长可以从红色连续调谐到紫色（425-715 nm）。这项工作表明，控制良好的金属铯铅卤化钙钛矿纳米/微球的合成可能为生产广泛可调谐和大大小型化的单模激光器提供另一种途径。
Single-mode laser is realized in a cesium lead halide perovskite submicron sphere at room temperature. All-inorganic cesium lead halide (CsPbX3, X = Cl, Br, I) microspheres with tunable sizes (0.2–10 μm) are first fabricated by a dual-source chemical vapor deposition method. Due to smooth surface and regular geometry structure of microspheres, whispering gallery resonant modes make a single-mode laser realized in a submicron sphere. Surprisingly, a single-mode laser with a very narrow line width (∼0.09 nm) was achieved successfully in the CsPbX3spherical cavity at low threshold (∼0.42 μJ cm–2) with a high cavity quality factor (∼6100), which are the best specifications of lasing modes in all natural nano/microcavities ever reported. By modulating the halide composition and sizes of the microspheres, the wavelength of a single-mode laser can be continuously tuned from red to violet (425–715 nm). This work illustrates that the well-controlled synthesis of metal cesium lead halide perovskite nano/microspheres may offer an alternative route to produce a widely tunable and greatly miniaturized single-mode laser.