论文部分内容阅读
以尿素为沉淀剂,采用均匀沉积法与硝酸锌反应获得了 ZnO 的纳米多晶颗粒。在飞秒脉冲激光激发下,观察到了 ZnO 纳米多晶颗粒的受激辐射现象,并从频域和时域两方面研究了 ZnO 纳米多晶的室温激射特性。氧化锌多晶颗粒中出现激子.激子散射导致的激射阈值为7.2 GW·cm~(-2),激射模式类似于 F-P 谐振腔模式,时域谱表现为寿命曲线中出现快速衰减成分。P 带时间衰减具有对称结构,高斯拟合结果只有几个皮秒。
Using urea as the precipitating agent, ZnO nanoparticles were obtained by homogeneous deposition and zinc nitrate reaction. Under the excitation of femtosecond pulsed laser, the stimulated emission phenomenon of ZnO nano-polycrystalline particles was observed, and the room-temperature lasing properties of ZnO nano-polycrystal were studied in both frequency and time domains. The exciton scattering induced a threshold of 7.2 GW · cm -2, and the lasing mode is similar to that of the FP resonator. The time domain spectrum shows the rapid decay in the lifetime curve ingredient. P with time attenuation has a symmetrical structure, Gaussian fitting results only a few picoseconds.