Double threshold behavior in a resonance-controlled ZnO random laser
Double threshold behavior in a resonance-controlled ZnO random laser
复制标题
DOI：
10.1063/1.4974334
复制
发表时间：
2017-03-01
期刊：
影响因子：
5.6
通讯作者：
Sasaki, Keiji
中科院分区：
文献类型：
--
作者：
Niyuki, Ryo;Fujiwara, Hideki;Sasaki, Keiji
在谐振控制的ZnO随机激光器中，我们观察到不同寻常的激光特性，如双阈值和激光峰蓝移。通过对激光阈值载流子密度的分析，我们发现第一和第二阈值的激光可能是由不同的机制产生的；第1阈值处的激光涉及激子复合，而第2阈值处的激光是由电子-空穴等离子体复合引起的，这是传统随机激光器的典型起源。这些现象与在定义良好的腔激光器中观察到的从极化激子激光到光子激光的转变非常相似。(C) 2017作者：
We observed unusual lasing characteristics, such as double thresholds and blue-shift of lasing peak, in a resonance-controlled ZnO random laser. From the analysis of lasing threshold carrier density, we found that the lasing at 1st and 2nd thresholds possibly arises from different mechanisms; the lasing at 1st threshold involves exciton recombination, whereas the lasing at 2nd threshold is caused by electron-hole plasma recombination, which is the typical origin of conventional random lasers. These phenomena are very similar to the transition from polariton lasing to photon lasing observed in a well-defined cavity laser. (C) 2017 Author(s).