结构化磷烯系统的等离激元及光电性质研究

As a typical many-body collective excitation in condensed matter physics, plasmons are becoming an important multidisciplinary frontier research field due to its great potential application in the fields of energy, material, biomedicine, and so on. Phosphorene is believed to the most promising monoatomic two-dimensional material except graphene in view of its special physical properties such as nonzero bandgap, high carrier mobility, anisotropy, and so on. Therefore, it is of important scientific significance and application prospect to study the plasmons in phosphorene. In this project, we will carry out the following researches on the plasmons and electro-optical properties of the structured phosphorene systems: The electro-optical properties of the phosphorene systems dressed by quantum antidots, quantum dots, nanoribbon, and so on; The plasmons, interplasmon coupling, optical field enhancement and their manipulation; The optical properties of the multilayer composed of the structured phosphorene and dielectrics; The influences of the strains, electric field, magnetic field, and defects on the structured phosphorene plasmons and electro-optical properties. This research will carry out a leading investigation on the phosphorene plasmonics based on the structured phosphorene systems, which will be helpful in deep understanding the phosphorene plasmons and the related optical and electrical properties. We believe our work will lay a solid foundation for designing the phosphorene-plasmon-based optical or optoelectronic devices.

作为凝聚态物理中一种典型的多体集体激发，等离激元因其在能源、材料、生物医学等领域的巨大潜在应用引起了人们的广泛关注。磷烯以其独特的物理特性如非零带隙、高迁移率和各向异性等使其成为继石墨烯之后最具潜力的单原子层二维材料。因此，研究磷烯系统中的等离激元具有重要的科学意义和应用价值。本项目将针对结构化磷烯的等离激元以及光电性质等重点开展如下研究：研究带有量子反点、量子点、纳米带等的结构化磷烯的光电性质，研究结构化磷烯中的等离激元、等离激元耦合、光学场增强及调控，研究结构化磷烯与介质耦合的多层材料结构的光学特性，研究应力、电场、磁场、缺陷等对结构化磷烯等离激元等的影响。本研究将围绕结构化磷烯系统率先开展磷烯等离激元学的研究，有助于形成对磷烯等离激元及其光学和电学特性的深刻理解，为设计磷烯等离激元光学或光电子器件等奠定坚实基础。

磷烯以其独特的物理特性如非零带隙、高迁移率和各向异性等使其成为继石墨烯之后最具潜力的单原子层二维材料。因此，研究结构化磷烯的光电性质和等离激元等具有重要的研究意义。基于此，本项目基于紧束缚方法、第一性原理和非平衡格林函数方法，开展了结构化磷烯的深入研究：研究了磷烯量子点的能级、光学性质和调控；研究了磷烯纳米的能带、输运性质，发现了Z纳米带输运性质的普适性；研究了蓝磷烯的结构非对称性，考虑应力、缺陷、钝化等的影响；基于结构化磷烯的研究，进一步在应用方面进行了探索，开展了薄膜的等离激元和催化性能等方面的研究。本项目取得了一些有意义的结果，将加深对结构化磷烯电学和光学特性的理解，为探索磷烯等相关体系的应用提供参考。