Enhanced optical confinement and lasing characteristics of individual urchin-like ZnO microstructures prepared by oxidation of metallic Zn

Chia Hao Lu, Tzu Yang Chao, Ying Feng Chiu, Shuo Yen Tseng, Hsu Cheng Hsu

研究成果: Article同行評審

16 引文 斯高帕斯(Scopus)

摘要

We prepared urchin-like micron-sized ZnO cavities with high optical quality by oxidizing metallic Zn and proposed the mechanism that resulted in the growth of the urchin-like microstructures. The photoluminescence spectra of the ZnO microstructures had a predominant excitonic emission at room temperature. The lasing properties of the urchin-like ZnO microstructures were investigated systematically through excitation power- and size-dependent photoluminescence measurements. The results showed that a low lasing threshold with high quality factors could be achieved because of the high reflectivity of the optical reflectors formed by the tapered nanowires. The unique optical characteristics may facilitate the development of high-efficiency random lasers.

原文English
文章編號178
期刊Nanoscale Research Letters
9
發行號1
DOIs
出版狀態Published - 2014

All Science Journal Classification (ASJC) codes

  • 材料科學(全部)
  • 凝聚態物理學

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