论文标题
核/CDSE/CDS胶体纳米板的集合中激子的光学对齐和方向
Optical alignment and orientation of excitons in ensemble of core/shell CdSe/CdS colloidal nanoplatelets
论文作者
论文摘要
我们报告了核/壳/壳CDSE/CDS胶体纳米片的集合中光学比对和光学取向效应的实验和理论研究。在Faraday几何形状上应用的三个Stokes参数对磁场上的依赖性在激发子发光的连续波谐振激发下测量。在强烈的电子和孔交换相互作用和集合中纳米片的平面内方向的情况下，开发了理论模型，以考虑到明亮和深色激子状态。数据分析使我们能够估计明亮和深色激子的时间和能量参数。即使在没有明显的光谱线分辨率的情况下，光学比对效应也能够鉴定出激光光谱的激子和TRION贡献。
We report on the experimental and theoretical studies of optical alignment and optical orientation effects in an ensemble of core/shell CdSe/CdS colloidal nanoplatelets. The dependences of three Stokes parameters on the magnetic field applied in the Faraday geometry are measured under continuous wave resonant excitation of the exciton photoluminescence. Theoretical model is developed to take into account both bright and dark exciton states in the case of strong electron and hole exchange interaction and random in-plane orientation of the nanoplatelets in ensemble. The data analysis allows us to estimate the time and energy parameters of the bright and dark excitons. The optical alignment effect enables identification of the exciton and trion contributions to the photoluminescence spectrum even in the absence of a clear spectral line resolution.
