基于单一半导体纳米线的能带调控及其光电特性研究

Based on the current research status and development trend of nanoscale semiconductor optoelectronics materials and devices, as well as the national strategic demands on the development of tunable, high-density, ultra-high-speed, high-efficiency and energy-saving devices and technologies in the field of optoelectronic information, this project starts from the graded energyband design of single semiconductor nanowires, and develop a new nanowire growth technology to achieve series of new composition graded semiconductor nanowires with bandgap continuously tunable from near-ultraviolet to near-infrared spectrum region along the length of single wires. We will systematically investigate the optical and electrical transport process along these new one dimensional nanostructures, and study the observed novel physical phenomenon and optoelectronic properties. More importantly, using the as-grown composition graded nanowires (with either symmetric or asymmetric bandgap distribution along their length) as material platforms, we will try to realize series of new nanoscale optical information processing devices, like ultra-low threshold nanowire lasers, nanowire optical diodes, wavelength-selective waveguides, nanoscale white light emitters, broad-band spectrum detectors and so on. Also using these composition graded nanowires as basic circuit connectors and functional components, we will seek to design and build up nanowire-based optical integrated circuits to realize some fundamental optical logic units or devices.

基于低维半导体结构和光电信息器件的研究现状和战略需求，本项目利用我们在半导体纳米结构的可控制备和微纳光电探测方面的技术优势和工作基础，以单纳米线能带调控为出发点，可控的制作出系列新型的组分空间调控的一维半导体纳米结构，包括单纳米线组分梯度结构、异质结构和纳米线-量子点复合纳米结构。并以这些新型纳米结构为材料平台，系统研究常规纳米结构所不具有的在电子输运、载流子的传输和复合、光波导以及光电调控等方面的独特性质。同时探讨这些特性在新型纳米光电子器件上的应用。同时借此项目的顺利开展，锻炼出一支高水平的纳米光电子材料和物理研究团队，培养一批优秀研究生和青年骨干教师，为提高我国在新型光电信息材料和器件研究领域的国际影响力和原创能力做出重要贡献。

基于低维半导体结构和光电信息器件的研究现状和战略需求，本项目利用我们在半导体纳米线结构的可控制备和微纳光电探测方面的技术优势和工作基础，以单纳米线能带调控为出发点，可控的制作出了系列新型的组分空间调控的纳米结构，包括但纳米结构组分梯度，异质结构和纳米线-量子点复合结构。并以这些新型纳米结构为材料平台，系统地研究了常规纳米结构不具备的在电子输运，载流子符合与传输，光波导以及光电调控等方面的独特性质。同时探讨了这些特性在新型纳米光电子器件上的应用。同时借此项目的顺利展开，锻炼出了一支高水平的新型纳米光电子和物理研究团队，培养了一批优秀研究生和青年骨干教师，为提高我国在新型光电信息材料和器件研究领域的国际影响力和原创能力做出了贡献。