纵向耦合金属微纳结构中的高效发光及光谱调控物理研究

The project mainly focuses on the mechanism of enhanced light emission and spectrum manipulation in metallic film-coupled metal nanoparticles systems with emitters embedded in the gap layer region. For example,nonlocal effects,magnetic dipole resonances,the ultimate field enhancement and their impact on spontaneous emission and other radiative processes. One coupled plasmonic systems - a single isolated silver nanoprisms positioned a specified distance above a metallic film,separated by grapheme,azo polymer spacer layer - which is simple to fabricate and provides exquisite control of the spacing, is presented. We theoretically and experimentally examine the light radiative processes associated with nonlocal effects, magnetic dipole resonances and the ultimate field enhancement in the coupled systems. The research will also discuss the potential application in the field of enhanced light emission, stimulated emission of radiation, ultra-sensitive spectral measurement and optical imaging, etc.

本申请围绕纵向耦合金属微纳结构中的高效发光及光谱调控物理问题，如：非局域效应、磁共振效应、增强的物理极限及其对高效发光、光谱调控的影响， 设计银三角片-石墨烯（偶氮聚合物）-银膜纵向耦合结构，理论与实验结合开展研究。并探讨相关光学效应在高效发光、激射，高灵敏、高分辨光谱测量，新型光学成像等方面的可能应用。

我们围绕纵向耦合金属微纳结构中的高效发光及光谱调控物理问题，在非局域效应、磁共振效应对高效发光、光谱调控的影响，及相关光学效应在高灵敏、高分辨光谱测量，光学成像等方面的应用开展研究，取得了一些重要的成果。特别是：成功发展了易制备、可重复、多参数可调的纵向耦合结构制备手段；纵向耦合结构中模式特性及其调控的发光、SERS增强；纵向耦合全介质深亚波长多层膜中等效介质理论的失效与重建过程，以及基于此膜层结构的高效焦场调控；基于模板、膜层纵向耦合，制备实现了宽谱、低表面电阻、高透射率的图案化金属膜透明电极；发展了磁共振效应的光场调控及高精度纳米测量。上述相关研究在学术界引起一定的关注，已在Physical Review B, Physical Review Applied, Advanced Optical Materials,ACS Photonics ,Optics Express, Optics Letters, Nanotechnology等刊物上发表SCI论文15篇，在《光学学报》发表论文1篇(被评为2020年第04期的"优秀论文")。课题执行期内共有8人获博士学位，1人获硕士学位。