Whispering gallery modes and random lasing in ZnO microstructures
Whispering gallery modes and random lasing in ZnO microstructures
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DOI：
10.1088/1464-4258/11/7/075001
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发表时间：
2009-07
影响因子：
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通讯作者：
V. Ursaki;A. Burlacu;E V Rusu;V. Postolake;I. Tiginyanu
中科院分区：
文献类型：
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作者：
V. Ursaki;A. Burlacu;E V Rusu;V. Postolake;I. Tiginyanu
分别采用金属有机化学气相沉积和碳热蒸发技术生长了由分级纳米结构构建的半球形ZnO微盘和半球形ZnO微结构。这些技术确保了所生产的结构的高光学质量，以便与高品质因数激光谐振器组合用作紫外光谱区域中的受激发射的增益介质。直径约为1.8 µm，厚度为100 nm的ZnO微圆盘谐振器支持品质因数为640的回音壁模式，而半球形ZnO微结构中的激光则代表品质因数为640-800的微棒中的回音壁模式和品质因数约为3000的ZnO纳米线阵列中的随机激光的组合。
Hexagonal ZnO microdiscs and hemispherical ZnO microstructure built from hierarchical nanostructures have been grown by metal–organic chemical vapour deposition and carbothermal evaporation technologies, respectively. The technologies ensure as high an optical quality of the produced structures so as to act as a gain medium for stimulated emission in the ultraviolet spectral region in combination with high quality factor laser resonators. The ZnO microdisc resonators with diameters of around 1.8 µm and thicknesses of 100 nm support whispering gallery modes with a quality factor of 640, while the lasing in the hemispherical ZnO microstructure represents a combination of whispering gallery modes in microrods with a quality factor of 640–800 and random lasing in an array of ZnO nanowires with a quality factor of around 3000.