Origins of lasing emission in a resonance-controlled ZnO random laser
Origins of lasing emission in a resonance-controlled ZnO random laser
复制标题
DOI：
10.1088/1367-2630/16/9/093054
复制
发表时间：
2014-09-30
影响因子：
3.3
通讯作者：
Adachi, Sadao
中科院分区：
文献类型：
--
作者：
Nakamura, Toshihiro;Fujiwara, Hideki;Adachi, Sadao
我们研究了由ZnO纳米粉末制成的散射共振控制的随机激光器在宽温度范围（20-300 K）内的激光发射起源。在较高温度下（> 150 K），激光发射出现在激子复合能附近，激光阈值载流子密度与Mott密度相当，表明共振控制的随机激光正向激子激光方向发展;在较低温度下，由于阈值载流子密度远大于Mott密度，随机激光是由通常的电子-空穴等离子体复合引起的。
We investigate the origins of lasing emission in a scatterer-resonance-controlled random laser made of ZnO nanopowder over a wide temperature range (20-300 K). At higher temperatures (> 150 K), the lasing emission appears around exciton recombination energies and the lasing threshold carrier density is comparable to the Mott density, indicating that the resonance-controlled random laser is going toward showing excitonic lasing; at lower temperatures, random lasing is caused by usual electron-hole plasma recombination because of the threshold carrier density being much larger than the Mott density.