Lasing of CdSe/SiO2 nanocables synthesized by the facile chemical vapor deposition method.
Lasing of CdSe/SiO2 nanocables synthesized by the facile chemical vapor deposition method.
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DOI：
10.1039/c1nr10392j
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发表时间：
2011-08
期刊：
影响因子：
6.7
通讯作者：
Y. Ye;Yaoguang Ma;Song Yue;L. Dai;Hu Meng;Zhi Li;L. Tong;G. Qin
中科院分区：
文献类型：
--
作者：
Y. Ye;Yaoguang Ma;Song Yue;L. Dai;Hu Meng;Zhi Li;L. Tong;G. Qin
半导体纳米电缆是开发坚固且环境稳定的纳米激光器的良好候选者。在这项工作中，通过简便的化学气相沉积方法合成了高质量的CdSe/SiO(2)纳米电缆。通过扫描电子显微镜、高分辨率透射电子显微镜和能量色散 X 射线光谱仪对合成的纳米电缆进行了表征。结果证实，纳米电缆的核为单晶六方CdSe纳米线(NWs)，生长方向为[0001]，壳为非晶SiO(2)。通过将纳米电缆制造到法布里-珀罗腔中，首次报道了单根纳米电缆的室温激光特性。采用有限元方法模拟纳米电缆光学谐振腔内外的电磁场分布。理论和实验结果都表明，光子模式限制对纳米电缆的芯直径存在很强的依赖性。
Semiconductor nanocables are good candidates for developing robust and environmental stable nanolasers. In this work, high-quality CdSe/SiO(2) nanocables were synthesized by the facile chemical vapor deposition method. The as-synthesized nanocables were characterized by scanning electron microscopy, high-resolution transmission electron microscopy, and energy-dispersive X-ray spectroscopy. The results confirm that the cores in the nanocables are single crystalline hexagonal CdSe nanowires (NWs) with the growth direction of [0001], and the shells are amorphous SiO(2). Room-temperature lasing properties of single nanocables were reported for the first time by fabricating the nanocables into Fabry-Pérot cavities. The finite element method was employed to simulate the electromagnetic field distributions inside and outside the nanocable optical resonant cavities. Both the theoretical and experimental results show that there exists a strong dependence of the photonic mode confinement on the core diameter of the nanocable.