Department of Chemistry, Northwestern University, Evanston, IL 60208.
Department of Materials Science and Engineering, Northwestern University, Evanston, IL 60208.
Proc Natl Acad Sci U S A. 2022 May 31;119(22):e2202621119. doi: 10.1073/pnas.2202621119. Epub 2022 May 23.
SignificanceMolecules interacting with metallic nanostructures can show tunable exciton-plasmon coupling, ranging from weak to strong. One factor that influences the interactions is the spatial organization of the molecules relative to the localized plasmon-enhanced electromagnetic fields. In this work, we show that the arrangement of aromatic dye molecules can be tuned within plasmonic hotspots by interfacial engineering of nanoparticle surfaces. By controlling the local chemical and physical interactions, we could modulate lasing thresholds. Surface-functionalized plasmonic metasurfaces open prospects for programmable light-matter interactions at the nanoscale.
意义与金属纳米结构相互作用的分子可以表现出可调谐的激子-等离子体耦合，范围从弱到强。影响相互作用的一个因素是分子相对于局域等离子体增强电磁场的空间组织。在这项工作中，我们通过控制局部化学和物理相互作用，展示了通过纳米粒子表面的界面工程可以在等离子体热点内调整芳香染料分子的排列。表面功能化的等离子体超表面为纳米尺度上可编程的光物质相互作用开辟了前景。
