项目名称: 硅烯量子点中的表面等离激元研究
项目编号: No.11464023
项目类型: 地区科学基金项目
立项/批准年度: 2015
项目学科: 数理科学和化学
项目作者: 尹海峰
作者单位: 凯里学院
项目金额: 35万元
中文摘要: 硅烯是单原子层的硅薄膜,其结构与石墨烯类似,由于其奇特的物理性质特别是狄拉克-费米特性,近年来引起了人们的关注。同石墨烯一样,硅烯具有众多的新颖物理现象和应用潜能, 其中表面等离激元方面的应用前景尤其广阔。与以硅为基础的现代电子工业结合起来,硅烯量子点中的表面等离激元有望应用于纳米光电子器件、量子信息传输等领域。目前,硅烯量子点中表面等离激元的实际应用,还面临一些重要问题。其中,根据实际需要,如何调控硅烯量子点表面等离激元的共振机制还不清楚,硅烯量子点之间及硅烯量子点和衬底之间的耦合机理还没有研究。本项目针对以上物理问题,采用含时密度泛函和多体格林函数理论,研究不同的具体掺杂元素和掺杂方式如何调控硅烯量子点中表面等离激元的共振模式;硅烯量子点之间表面等离激元的耦合特征,以及不同衬底对硅烯量子点中表面等离激元的影响。通过本项目的研究,将为硅烯纳米光电子器件的应用提供直接的理论支持。
中文关键词: 表面等离激元;硅烯;量子点;掺杂硅烯量子点
英文摘要: Silicene, a single layer of thin film consisting of silicon atoms with honeycomb structures similar to graphene, has been attracting much attention because of its extraordinary physical properties, in particular its Dirac fermion characteristics. Silicene has many novel physical phenomena and potential applications. Thereinto, surface plasmons in silicene has especially wide application prospect. Combined with silicon-based modern electronics industry, silicene quantum dots are expected to be applied to many fields, such as nano-electronic devices, quantum information transmission. At present, the practical application of surface plasmons in silicene quantum dots still faces a number of important issues. Thereinto, for the actual situation, we still do not know how to tune surface plasmon resonance of the silicene quantum dots. The interaction mechanism between silicene nanostructure and substrates has not been studied, and, for the interaction mechanism between silicene nanostructures, the situation is the same. In order to solve the above problem, this project will investigate the surface plasmon in doped silicene nanostructures using time-dependent density functional theory and mang-body Green's function theory. We mainly research the influence of the specific doping elements and the specific doping structure on surface plasmons in doped silicene quantum dots. The coupling character of surface plasmons in silicene nanostructure pairs will be studied, and the influence of different substrates on surface plasmons in silicene quantum dots also will be investigated.The results could provide theoretical support for the application of silicene nano-optoelectronic devices.
英文关键词: surface plasmon;silicene;quantum dot;doped silicene quantum dots