Positioning of single quantum dots inside microcavities - coupling of individual quantum dots

该项目的目标是控制单个量子点(QD)、耦合量子点或柱腔内掺杂原子的位置，并研究它们的量子光学性质。量子点的精确定位将通过量子点在预图案层上的自组装生长来实现，预图案层将通过非原位光刻和蚀刻技术在将通过分子束外延生长的空腔层的下半部分上产生。单掺杂原子的定位将通过离子注入技术和结构化掩模的组合来执行。这些方法使得柱腔的制造可以系统地改变量子点、掺杂原子和柱腔的光学模式之间的相对位置。将使用时间分辨和光子统计测量来研究柱状空腔的光子发射中的集体效应，这些集体效应取决于发射体的数量及其在空腔内的位置。

The goal of this project is the controlled positioning of individual quantum dots (QD), coupled QDs, or alternatively doping atoms inside a pillar cavity and the study of their quantum optical properties. The exact positioning of the quantum dots will be performed by selfassembled growth of QDs on pre-patterned layers, which will be produced by ex-situ lithography and etching techniques on top of the lower half of a cavity layer which will be grown by molecular beam epitaxy. The positioning of single doping atoms will be performed by a combination of the ion implantation technique and a structured mask. These methods allow the fabrication of pillar cavities with a systematic variation of the relative position between QDs, doping atoms and the optical mode of the pillar cavity, respectively. Time-resolved and photon statistics measurements will be used to study collective effects in the photon emission of pillar cavities in dependence of the number of emitters and on their position inside the cavity.