利用硅基光子纳米结构调控二维材料的发光性质

新型具有直接带隙的半导体单层过渡金属硫化物（TMDs）为发展多功能纳米级光源带来了巨大机遇。但是，由于亚纳米的光和物质相互作用距离和缺陷的存在，单层TMDs发光效率不高。为了能够实际应用这些新型材料，我们需要寻找新的方法来增强TMDs与光的相互作用，尤其是其发光效率。另一方面，低损耗的硅基光子纳米结构具有Mie散射和磁共振等优异性质，显示出很强的控制纳米级光源发光和集成的能力。因此，这个项目主要是探索利用与硅基光子纳米结构集成的方法来调控二维材料发光。我们主要研究以下三个方面：（1）设计和制备新型的硅基光子纳米结构来调控发光；（2）设计新的将二维材料集成到光子纳米结构上的方法和测量表征发光性质的手段；（3）探索将二维材料集成到芯片上以用于光通信的方法。这个项目的开展有助于加深我们对于二维材料和光相互作用机理的理解，从而有力推动二维材料在包括片上光通信、显示技术和量子光学等多方面的实际应用。

Emerging monolayer transition metal dichalcogenides (TMDs) with direct bandgap brings great opportunity for multifunctional nanoscale light source. However, the light-emitting efficiency of such monolayer TMDs is generally low due to the subnanometer light-matter interaction length and defects. To enable their practical applications, new schemes are desirable to enhance their interaction with light, especially the light-emitting efficiency. On the other hand, silicon-based photonic nanostructures with low loss own novel properties such as Mie scattering and magnetic resonance, which shows great potential for controlling light emission of nanoscale emitters and for integration. Thus, this project is mainly about developing new schemes of integration of 2D materials with novel silicon-based photonic nanostructures to control the light emission properties from them. We mainly focus on the following aspects: (1) Design and fabricate new silicon-based photonic nanostructures for emission control. (2) Develop new methods of integration of 2D materials with novel photonic nanostructures and new tools to characterize the emission from the hybrid structure; (3) Explore on-chip integration of 2D materials to enable further applications for optical communication. This project will enhance our understanding of the light-matter interaction in novel 2D materials, and further facilitate the practical applications of 2D materials in various fields including on-chip optical communication, display technology and quantum photonics.