Optical and electronic properties of nanowires and quantum dots structures/Propriétés optique et électroniques de nanofils et structures à boîtes quantiques

固态纳米线（NW）和量子点（QD）结构制造的最新进展为光伏和量子计算应用开辟了有趣的途径。例如，通过在多结太阳能电池结构的中间部分中插入QD，或者通过对基于NW的电池使用径向P-N结几何形状，预期增强的光电转换效率。对于量子密码学和量子计算应用，量子点可以用作非经典光子源的活性材料以及基于自旋量子位的逻辑门。 纳米结构可以使用最先进的晶体生长技术生产，然后使用微米和纳米制造工艺集成到有用的器件中。生长条件、生长后处理和制造工艺的优化仍然是控制纳米结构及其层器件周围结构特性所必需的。要更好地理解这些先进器件的物理特性，需要精确地了解材料和结构特性对自旋弛豫、激子态、载流子复合和输运机制的影响。 纳米技术领域的进展主要归功于涉及设计、制造和表征基于纳米结构的材料和器件的各种能力的小组努力。通过重要的研究合作，我现在有机会为这一领域的前沿雄心勃勃的项目做出贡献。我提供光谱学和超快激光技术方面的专业知识，以支持此类研究活动。最近的先进技术现在提供了多种表征工具，用于研究纳米结构的基本性质。我的研究计划的主要目标是：1）通过利用可见光，近红外或太赫兹探针的技术组合，更好地研究它们的材料和器件特性，2）使用这些结果指导实现创新的基于纳米结构的太阳能电池和量子计算设备。

Recent advances in the fabrication of solid-state nanowires (NWs) and quantum dots (QDs) structures open interesting avenues for photovoltaic and quantum computation applications. For instance, enhanced light to electricity conversion efficiency is expected through the insertion of QDs in the middle part of a multi-junction solar cell structure, or by using a radial P-N junction geometry for NWs-based cells. For quantum cryptography and quantum computation applications, QDs can be used as the active material of non-classical sources of photons as well as spin qubits-based logic gates. Nanostructures can be produced using state-of-the art crystal growth techniques, and then integrated into useful devices using micro- and nanofabrication processes. Optimization of the growth conditions, post-growth treatments, and fabrication processes is still necessary to control nanostructures and their layer device surrounding structural properties. Better understanding the physics of these advanced devices requires knowing precisely the influences of material and structural properties on spin relaxation, exciton states, and carrier recombination and transport mechanisms. Progresses in the field of nanotechnologies are largely attributable to group efforts involving various capabilities in designing, fabricating and characterizing nanostructure-based materials and devices. Through important research collaborations, I now have the opportunity to contribute to forefront ambitious projects in this field. I am offering specialized expertise in spectroscopy and ultrafast laser technologies to support such research activities. Recent advanced technologies are now offering a diversity of characterization tools for investigating fundamental properties of nanostructures. The main objectives of my research program are: 1) to better investigate their material- and device- characteristics through a combination of techniques that utilize either visible, near-infrared or terahertz probes and 2) to use these results for guiding realization of innovative nanostructures-based solar cell and quantum computing devices.