垂直氧化锌纳米线中的激射现象(英文)  

The Lasing Action Observed in Aligned ZnO Nanowires

作　　者：郭振[1,2,3] Andreazza-Vignolle Caroline Andreazza Pascal 赵东旭[3] 刘益春[4] 张立功[3] 李炳辉[3] 张振中[3] 申德振[3] 

机构地区：[1]奥尔良大学 [2]法国科学院材料分离研究中心 [3]中国科学院激发态物理重点实验室长春光学精密机械与物理研究所,吉林长春130033 [4]东北师范大学先进光电功能材料研究中心,吉林长春130024

出　　处：《发光学报》2011年第5期462-465,共4页Chinese Journal of Luminescence

基　　金：Project supported by the Key Project of National Natural Science Foundation of China(50532050);the "973" Program(2006CB604906,2008CB317105);the Innovation Project of Chinese Neademy of Sciences;the National Natural ScienceFoundation of China(60506014,10674133,60776011)~~

摘　　要：通过水热的方法以退火0.5h的ZnO薄膜作为籽晶,得到垂直的ZnO纳米线。在X射线衍射谱中,除了Si的(400)衍射峰以外,只观察到了ZnO的(002)衍射峰。室温光致发光谱中出现了强的紫外发射峰,同时也伴随着弱的缺陷相关的发射。这些数据表明垂直的ZnO纳米线序列有着较好的晶体质量。同时,通过光泵浦也观察到了ZnO纳米线中的激光发射。当激发功率密度超过阈值且进一步增加时,出现了多模发射峰,其积分强度随着激发功率密度的增大呈非线性的增长,并且在96kW·cm^(-2)处能清晰地观察到从自发发射到激射的转变。Aligned ZnO nanowires（NWs）were obtained by hydrothermal method using annealed ZnO film as seed layer.Besides Si（400）,only ZnO（002）diffraction peak was observed in X-ray diffraction（XRD）pattern.The lasing emissions were observed in optically pumped aligned ZnO NWs.Multi-mode emission peaks emerged when the excitation power density exceed the threshold.The integrated intensity of the spectra increases nonlinearly with the excitation power density.and the transition point from the spontaneous emission to lasing at about 96 kW/cm^2 can be clearly observed.

关 键 词：激光 ZNO 垂直纳米线 

分 类 号：O472.3[理学—半导体物理] O482.31[理学—物理]