Optical spectroscopy of semiconductor nanowire quantum dots

该项目是研究纳米线量子点的光学性质。这些是一种新型的量子点结构，其中量子点形成在硅衬底上外延生长的半导体纳米线中。与研究得更多的自组装系统不同，纳米线量子点具有许多优点，包括对其尺寸的更多控制，通过衬底的预生长图案化定位纳米线的能力以及直接并入光学腔中。样品将在UCL生长，结构研究将在沃里克物理进行。学生将通过显微光致发光来研究其光学特性，这种光致发光允许探测单个纳米线。其目的是获得其电子和光学特性的详细知识，从而优化包括激光和单光子源在内的许多应用。

The project is to study the optical properties of nanowire quantum dots. These are a new type of quantum dot structure in which a quantum dot is formed in a semiconductor nanowire which is grown epitaxially on a silicon substrate. Unlike the much more studied self-assembled system nanowire quantum dots have a number of advantages including more control of their dimensions, the ability to position the nanowire via pre growth patterning of the substrate and direct incorporation in an optical cavity. Samples will be grown at UCL and structural studies will be performed at Warwick Physics. The student will study the optical properties via micro-photoluminescence which allows single nanowires to be probed. The aim will be to obtain a detailed knowledge of their electronic and optical properties, allowing optimisation for a number of applications including lasers and single photon sources.