U.S.-Italy Cooperative Research Program: Probing Interdot Coupling within Semiconductor Quantum Dot Molecules

这个为期三年的奖项为马里兰大学的Raymond Phaneuf和意大利莱切大学的Roberto Cingolani的合作提供了支持。他们研究的主要目标是研究InxGa1-xAs/GaAs系统中自组装量子点的耦合。他们计划完成自组装，控制少量量子点的耦合，并有选择地探测单个耦合量子点分子。这两个实验室的能力互补。美国实验室将比较在有图案的衬底上生长的薄应力源层的结果与在重新生长之前用光刻技术生产的合金台面阵列的结果。使用图像化和MOCVD生长的平行研究将在莱切进行。意大利实验室开发了使用扫描隧道发光技术来选择性地探测单个耦合量子点分子的技术。自组装量子点的现有应用包括光电器件，如量子点激光器。一个潜在的重要应用是使用耦合量子点和量子比特进行量子信息处理。

0242579PhaneufThis three-year award provides support for Raymond Phaneuf of the University of Maryland to work with Roberto Cingolani of the University of Lecce, Italy. The primary goal of their research is to investigate the coupling of self-assembled quantum dots in the InxGa1-xAs/GaAs system. They plan to accomplish self-assembly and to control coupling of small numbers of dots, and to selectively probe individual coupled-quantum dot molecules.The two laboratories have complementary capabilities. The US laboratory will compare results for thin stressor layers grown on patterned substrates with those for lithographically produced arrays of alloy mesas to pattern the surface before regrowth. Parallel investigations using patterning and MOCVD growth will be carried out at Lecce. The Italian laboratory has developed the technique of using scanning tunneling luminescence to selectively probe individual coupled-quantum dot molecules. Existing applications of self-assembled quantum dots include optoelectronic devices such as quantum dot lasers. A potentially important application is the use of coupled quantum dots and qubits for quantum information processing.