朱嘉麟^*， 许冬， 戴振生

（  清华大学；  ）

摘要： 本职称论文发表写作研究了外电场下耦合量子点中激子的光致发光谱，并与最近的实验结果作了比对。研究发现，外场和耦合量子点的对称性都会严重影响激子的4个S壳层态，这种效应可表现为外场和两量子点的差异对激子光谱以及光谱上的反向交叉点位置的影响。因此，可通过对场控激子光谱的测量，来确定两量子点的等同性以及获取耦合量子点的电子态和结构参数的信息。

Jia-Lin Zhu^*， Dong Xu， Zhensheng Dai

（  Tsinghua University；  ）

Abstract： Photoluminescence spectra of an exciton in coupled quantum dots under an electric field have been calculated and investigated, and it has been compared with a recent experiment. For coupled quantum dots, the four s-shell exciton states are dramatically affected by the electric field and the symmetry of the two dots. The electric field can induce anticrossings in the spectra, which are remarkably influenced by the differences between the two dots. The field-modified photoluminescence spectra can be used in the experiment to determine whether the two dots are identical and to obtain some information about electronic and structural parameters of coupled quantum dots.
Keywords： coupled quantum dots, photoluminescence spectra,symmetry

 

【收录情况】