Optical properties of spherical microcavities doped with quantum dots

掺杂量子点的球形微腔的光学特性

• 批准号: 5315820
• 负责人: Professorin Dr. Ulrike K. Woggon
• 金额: --
• 依托单位: Arbeitsgruppe Nichtlineare Optik (AG Woggon)
• 依托单位国家: 德国
• 项目类别: Priority Programmes
• 财政年份: 2001
• 资助国家: 德国
• 起止时间: 2000-12-31 至 2007-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/5315820?language=en
• 关键词: Optical; properties; spherical; microcavities; doped

The interaction of three-dimensionally confined photonic states with three-dimensionally confined electronic states will be studied in spherical microcavities doped with semiconductor quantum dots. To do this, polymeric spheres of radii between 2 and 20 µm will be chemically prepared and doped with quantum dots (QDs) of different materials and concentrations acting as the active optical emitter inside the cavity. By use of spatially and temporally resolved micro-photoluminescence experiments, the emission of single QD-doped spheres and of ensembles of spheres will be investigated in dependence on size of the spheres and size of the quantum dots, on temperature, excitation intensity and energy. The project is aimed at (a) the development of new preparation methods to achieve a high cavity quality Q and a controlled adjustment of sizes of both the microcavities and the quantum dots, (b) the study of the optical properties of arrays made from several spheres, (c) the test of microspheres doped with quantum dots as low-threshold laser in the visible spectral range, and (d) to achieve the limit of strong coupling between the discrete quantum dot states and the cavity modes.

本文研究了在掺半导体量子点的球形微腔中三维受限光子态与三维受限电子态的相互作用。为此，半径在2到20 μm之间的聚合物球体将被化学制备并掺杂不同材料和浓度的量子点（QD），作为腔内的有源光发射器。通过使用空间和时间分辨的显微光致发光实验，将根据球体的尺寸和量子点的尺寸、温度、激发强度和能量来研究单个QD掺杂球体和球体的集合的发射。该项目的目的是：（a）开发新的制备方法，以实现高腔质量Q和可控地调整微腔和量子点的尺寸，（B）研究由几个球体制成的阵列的光学特性，（c）测试掺杂量子点的微球体作为可见光谱范围内的低阈值激光器，以及（d）实现离散量子点态和腔模之间的强耦合的极限。