Time-resolved nonlinear luminescence of excitonic transitions in GaN
Time-resolved nonlinear luminescence of excitonic transitions in GaN
复制标题
DOI：
10.1063/1.1755853
复制
发表时间：
2004-06
影响因子：
3.2
通讯作者：
Y. Yamada;Y. Yoshida;T. Taguchi;H. Miyake;K. Hiramatsu;Y. Iyechika;T. Maeda
中科院分区：
文献类型：
--
作者：
Y. Yamada;Y. Yoshida;T. Taguchi;H. Miyake;K. Hiramatsu;Y. Iyechika;T. Maeda
通过时间分辨非线性发光光谱研究了GaN的激子光学性质，该光谱基于激发下的激发相关技术，其中主要的辐射复合过程发生从供体束缚激子到双激子的转变。在供体束缚激子线处观察到的非线性发光是由三个分量的叠加产生的：超线性信号的较快衰减分量、亚线性信号的较慢衰减分量和正碱基；也就是说，与当前测量中使用的时间范围（~600 ps）相比，超线性信号的衰减速度要慢得多。亚线性信号归因于供体束缚激子的状态填充效应，正基数归因于非辐射复合中心的饱和。此外，超线性信号归因于双激子发光的刺激，其看起来接近供体束缚激子发光......
Excitonic optical properties of GaN have been studied by means of time-resolved nonlinear luminescence spectroscopy, which was based on an excitation correlation technique under excitation at which a transition of the dominant radiative recombination process occurred from donor-bound excitons to biexcitons. Nonlinear luminescence observed at a donor-bound-exciton line resulted from the superposition of three components: a faster-decay component of a superlinear signal, a slower-decay component of a sublinear signal, and a positive base; that is, a much slower-decay component of a superlinear signal as compared with the time range employed in the present measurement (∼600 ps). The sublinear signal was attributed to the state-filling effect of donor-bound excitons, and the positive base was attributed to the saturation of nonradiative recombination centers. In addition, the superlinear signal was attributed to the stimulation of biexciton luminescence, which appeared close to the donor-bound-exciton lumines...