Journal
JOURNAL OF OPTICS A-PURE AND APPLIED OPTICS
Volume 11, Issue 7, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/1464-4258/11/7/075001
Keywords
nanocrystalline materials; laser materials; microcavity and microdisc lasers; random lasers
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Funding
- STCU [4034]
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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 mu m 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.
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