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

纳米线和量子点结构的光学和电子特性/Propriétés optique et électroniques de nanofils et Structures à boétes quantiques

• 批准号: 155452-2011
• 负责人: Morris, Denis
• 金额: $ 1.09万
• 依托单位: Université de Sherbrooke
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2015
• 资助国家: 加拿大
• 起止时间: 2015-01-01 至 2016-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=569469
• 关键词: Optical; electronic; properties; nanowires; quantum

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.

固体纳米线(NWS)和量子点(QDS)结构的制备为光伏和量子计算的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插入量子点，或者通过对基于NWS的电池使用放射状的P-N结几何结构，预期可以提高光电转换效率。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比特的逻辑门。 可以使用最先进的晶体生长技术来制造纳米结构，然后使用微米和纳米加工工艺将其集成到有用的设备中。优化生长条件、生长后处理和制造工艺对于控制纳米结构及其围绕结构特性的层器件仍然是必要的。要更好地理解这些先进器件的物理特性，就需要准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。 纳米技术领域的进步在很大程度上归功于小组的努力，这些努力涉及设计、制造和表征基于纳米结构的材料和设备的各种能力。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。我正在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各种各样的表征工具来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、近红外或太赫兹探测器的组合技术，更好地研究它们的材料和器件特性；2)利用这些结果来指导基于创新纳米结构的太阳能电池和量子计算设备的实现。