Djurisić Aleksandra B, Kwok Wai Ming, Leung Yu Hang, Phillips David L, Chan Wai Kin
Department of Physics, The University of Hong Kong, Pokfulam Road, Hong Kong.
J Phys Chem B. 2005 Oct 20;109(41):19228-33. doi: 10.1021/jp0528055.
Stimulated emission was studied using time-integrated and time-resolved photoluminescence in ZnO comb, tetrapod, and rod nanostructures. All the measurements were performed on ensembles of the nanostructures. The nanostructures were fabricated by vapor deposition (combs, tetrapods) and hydrothermal methods (rods). While stimulated emission was detected in all of the nanostructures, significant differences in the behavior of the stimulated emission, as well as the lasing threshold power, were found for different morphologies. The differences in the time evolution of the lasing spectra were particularly pronounced. The observed differences in the stimulated emission spectra of the three types of nanostructures in both exciton-exciton scattering and electron-hole plasma regimes are discussed.
利用时间积分和时间分辨光致发光对ZnO梳状、四足状和棒状纳米结构中的受激发射进行了研究。所有测量均在纳米结构的集合体上进行。纳米结构通过气相沉积（梳状、四足状）和水热法（棒状）制备。虽然在所有纳米结构中都检测到了受激发射，但发现不同形态的纳米结构在受激发射行为以及激光阈值功率方面存在显著差异。激光光谱时间演化的差异尤为明显。讨论了在激子 - 激子散射和电子 - 空穴等离子体区域中三种类型纳米结构的受激发射光谱的观测差异。
