Low-Threshold Nanowire Laser Based on Composition-Symmetric Semiconductor Nanowires
详细信息 查看全文
- 作者：Pengfei Guo ; Xiujuan Zhuang ; Jinyou Xu ; Qinglin Zhang ; Wei Hu ; Xiaoli Zhu ; Xiaoxia Wang ; Qiang Wan ; Pengbin He ; Hong Zhou ; Anlian Pan
- 刊名：Nano Letters
- 出版年：2013
- 出版时间：March 13, 2013
- 年：2013
- 卷：13
- 期：3
- 页码：1251-1256
- 全文大小：387K
- 年卷期：v.13,no.3(March 13, 2013)
- ISSN：1530-6992
文摘
Low-threshold nanoscale lasers are attractive for their promising applications in highly integrated photonic devices and systems. Here we report the controllable growth of composition-symmetric CdSxSe1鈥?i>x nanowires by using a multistep thermal evaporation route with moving sources. Microstructure analyses reveal the obtained wires are high-quality single crystals with the composition gradually changed from the center toward their both ends. Under laser illumination, these wires exhibit symmetrical color distribution along the length direction, with red at the center and green at the both ends. Optically pumped lasing is realized at room temperature using these composition-symmetric nanowires, with the threshold several times lower than that of composition-homogeneous wires. This new nanowire structure will have potential applications as low-threshold nanoscale lasers in integrated nanophotonics.