Quantitative description of disorder parameters in (GaIn)(NAs) quantum wells from the temperature-dependent photoluminescence spectroscopy
Quantitative description of disorder parameters in (GaIn)(NAs) quantum wells from the temperature-dependent photoluminescence spectroscopy
复制标题
利用温度依赖性光致发光光谱定量描述 (GaIn)(NAs) 量子阱中的无序参数
DOI：
10.1063/1.2058192
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发表时间：
2005
影响因子：
3.2
通讯作者：
W. Stolz
中科院分区：
文献类型：
--
作者：
O. Rubel;M. Galluppi;S. Baranovskii;K. Volz;L. Geelhaar;H. Riechert;P. Thomas;W. Stolz
对用于激光发射的（GaIn）（NAs）量子阱威尔斯的光致发光进行了实验和理论研究。所观察到的温度依赖性的发光斯托克斯位移和光谱线宽的证据的重组激发的动力学中的无序的重要作用。空间和能量的无序可以导致光生激发的局部化，推测为激子的形式。激子动力学的理论研究是通过动力学蒙特卡罗模拟激子跳跃和重组的局域态的流形。实验光谱和理论计算之间的直接比较提供了定量的信息（GaIn）（NAs）量子威尔斯的潜在波动的能量尺度。结果使一个量化的影响，退火的浓度上的局域态和/或（镓铟）（NAs）量子威尔斯的激子的本地化长度。
Photoluminescence in (GaIn)(NAs) quantum wells designed for laser emission was studied experimentally and theoretically. The observed temperature dependences of the luminescence Stokes shift and of the spectral linewidth evidence the essential role of disorder in the dynamics of the recombining excitations. The spatial and energy disorders can cause a localization of photocreated excitations supposedly in the form of excitons. Theoretical study of the exciton dynamics is performed via kinetic Monte Carlo simulations of exciton hopping and recombination in the manifold of localized states. Direct comparison between experimental spectra and theoretical calculations provides quantitative information on the energy scale of the potential fluctuations in (GaIn)(NAs) quantum wells. The results enable one to quantify the impact of annealing on the concentration of localized states and/or on the localization length of excitons in (GaIn)(NAs) quantum wells.