Xie Ping-bo, Zhao Fu-li, Li Ya-dong, Gong Zhen, Wang He-zhou
Division of Power and Particle Technology, Institute of Material Science and Engineering, South China University of Technology, Guangzhou 510640, China.
Guang Pu Xue Yu Guang Pu Fen Xi. 2005 Jun;25(6):848-53.
Highly-oriented single crystal ZnO columns array was prepared by a simple two-step evaporation oxidation method. And the photoluminescence properties of different direction excitation were investigated. Upon different direction excitation, the emission spectra were greatly different. Besides the relative intensity of different emission peak of PL changed; some new emission peaks werealso detected at high excitation power. This showed that the energy absorption, transmission and emission in one dimension ZnO column array were directional. The up-conversion polarized photoluminescence spectra were also found, and the intensities of 400 nm emission peak were affected by the laser polarization orientation. These results showed that the intensity and shape of PL were related with the direction and polarization of the excitation laser. The results also give some important references for subminiature one dimension line array optoelectric device.
通过一种简单的两步蒸发氧化法制备了高度取向的单晶ZnO柱阵列。并研究了不同方向激发下的光致发光特性。在不同方向激发下，发射光谱有很大差异。除了PL不同发射峰的相对强度发生变化外，在高激发功率下还检测到一些新的发射峰。这表明一维ZnO柱阵列中的能量吸收、传输和发射是有方向性的。还发现了上转换偏振光致发光光谱，400nm发射峰的强度受激光偏振方向的影响。这些结果表明PL的强度和形状与激发激光的方向和偏振有关。这些结果也为超微型一维线阵列光电器件提供了一些重要参考。
