近年來，因為全無機金屬鹵化物鈣鈦礦具有穩定及低成本的優點，因此在光電元件應用中成為相當有前景的材料。其中不同形狀的雷射微共振腔已經被發表，然而，卻很少深入研究不同形狀共振腔之間的雷射表現，因此本論文利用化學氣相沉積法，並藉由控制製程溫度及壓力，成長三種形狀的溴化銫鉛微米結構。
由X光繞射(XRD)分析及時間解析光致發光(TRPL)光譜，得以證明我們的微米結構具有高結晶品質，此外，方形微米盤、直角三角形截面的的微米柱及微米圓台在室溫下可以達成雷射。另外，透過晶體的雷射放光圖片以及模態間距和路徑長倒數的關係，我們得知可能的共振模態如下，方形微米盤及微米圓台為耳語迴廊模態(WGM)，而微米柱為類耳語迴廊模態(WGM-like)，其中，方形微米盤具有最好的雷射表現，其擁有高於18000的品質因子(Q-factor)，除此之外，雷射閥值與方形微米盤邊長的關係也在本研究中討論，最後，我們也探討了微米柱雷射放光的偏振特性。

In recent years, all-inorganic metal halide perovskites are emerging as one of the most promising materials for application of the photonic devices due to their robustness and low cost. For microcavity laser application, lasing actions from different shapes of such materials were reported. However, relatively few in-depth comprehensive studies on the lasing properties of various-shaped microcavities were studied so far. Herein, three types of chemical vapor deposition (CVD)-grown CsPbBr3 microstructures can be fabricated by controlling the growth temperature and pressure. By x-ray diffraction and time-resolved-photoluminescence results, we confirmed that our microcrystals own high crystalline quality. Moreover, the lasing action from single square microplatelet, triangular microrod, and circular truncated cone could be achieved at room temperature. Then we identified the possible resonator mode by the lasing images and the relation of between the mode spacing and the inverse of a round trip. We found the whispering gallery mode (WGM) oscillation in square microplatelets and circular truncated cones and a WGM-like oscillation in microrods. The best lasing performance with Q-factor of more than 18000 can be observed from the square microplatelets. Furthermore, the relationship between the lasing threshold and the edge length of the square microplatelets was investigated. Finally, in the case of microrods, the polarization characteristics of the lasing emission were intensively addressed.

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