论文标题
多面等离子体纳米腔
Multi-faceted plasmonic nanocavities
论文作者
论文摘要
等离子体纳米腔形成了纳米金属结构之间的非常强大的亚纳米缝隙，并在深度亚波长体积中的光线限制，以实现对光 - 物质相互作用的前所未有的控制。然而，球形纳米颗粒在合成过程中获得了各种多面体形状，这定义了控制许多光晶相互作用（例如光催化反应）的影响。在这里，我们专注于由三个多面体纳米颗粒（Cuboctahedron，Rhombicuboctahedron，decahedron）制成的纳米腔，这些纳米颗粒通常发生在球形纳米颗粒的合成过程中。他们的光子模式在近场和远场中具有非常复杂且丰富的光学行为。通过一种重组技术，我们获得了由放置在这些纳米腔内的分子产生的远场，以揭示能量伴侣如何进出系统。这项工作铺平了理解和控制光线相互作用的方式，例如在这种极端环境中的光催化反应和非线性振动泵送。
Plasmonic nanocavities form very robust sub-nanometer gaps between nanometallic structures and confine light in deep subwavelength volumes to enable unprecedented control on light-matter interactions. However, spherical nanoparticles acquire various polyhedral shapes during their synthesis, which has defining impact on controlling many light-matter interactions, such as photocatalytic reactions. Here, we focus on nanocavities made of three polyhedral nanoparticles (cuboctahedron, rhombicuboctahedron, decahedron) that commonly occur during the synthesis of spherical nanoparticles. Their photonic modes have a very intricate and rich optical behaviour, both in the near- and far-field. Through a recombination technique, we obtain the total far-field produced by a molecule placed within these nanocavities, to reveal how energy couples in and out of the system. This work paves the way towards understanding and controlling light-matter interactions, such as photocatalytic reactions and non-linear vibrational pumping, in such extreme environments.
