Aligned growth of ZnO nanowires and lasing in single ZnO nanowire optical cavities
Aligned growth of ZnO nanowires and lasing in single ZnO nanowire optical cavities
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DOI：
10.1007/s00340-007-2891-4
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发表时间：
2008-01
期刊：
影响因子：
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通讯作者：
R. Guo;J. Nishimura;M. Matsumoto;M. Higashihata;D. Nakamura;J. Suehiro;T. Okada
中科院分区：
文献类型：
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作者：
R. Guo;J. Nishimura;M. Matsumoto;M. Higashihata;D. Nakamura;J. Suehiro;T. Okada
采用无催化剂的纳米粒子辅助脉冲激光沉积法在N2气氛中制备了有序ZnO纳米线阵列。通过介电泳在电极间隙中收集单个ZnO纳米线。在高于激发激光（λ= 355 nm）阈值为1.334 kW/cm 2的光泵浦下，室温下观察到单根ZnO纳米线的紫外激光行为，表明在纯N2背景气体中合成的纳米线具有高质量。纳米线两端的晶面形成了一个光腔。因此，在光致发光光谱中观察到对应于各个纳米线的腔长度的模式间距。
Ordered ZnO nanowire arrays have been fabricated in N2background gas by catalyst-free nanoparticle-assisted pulsed-laser deposition. A single ZnO nanowire was collected in an electrode gap by dielectrophoresis. Under the optical pumping above an exciting laser (λ= 355 nm) threshold of ∼ 334 kW/cm2, ultraviolet lasing action in a single ZnO nanowire was observed at room temperature, indicating that the as-synthesized nanowires in pure N2background gas are of high quality. The crystalline facets of both ends of the nanowire acted to form an optical cavity. Therefore, the mode spacings corresponding to cavity lengths of the respective nanowires were observed in photoluminescence spectra.