| 研究実績の概要 |
The purpose of this project is to develop a method for amplifying chiral light-matter interactions using bottom-up-based 3D chiral nanoparticles. This year, we followed two directions: 1) Understanding the mechanism of the generation of a strong chiroptical signal of the helicoid nanoparticle and 2) Nanoscale chiral coupling between nanoparticles and molecules. For direction 1, we succeeded to understand the physical origin of strong chiral light emission of the helicoid nanoparticle, which was achieved last year. We conducted a numerical simulation and demonstrated that a strong chiral field of spatially overlapped excitation and emission mode enables the exceptional performance of chiral light emission. We believe that this study can be a good starting point for utilizing the nano-confined chiral electromagnetic field of bottom-up materials in a variety of light-matter interactions. The current result is in preparation for the manuscript. For direction 2, we established a reproducible method for utilizing a chiral hot-spot, which is a local field of maximized and single-handed chirality. Based on a localized photopolymerization approach on the surface of nanoparticles, we succeeded to produce a chiral hybrid nanostructure that accurately coupled molecular dye and chiral hot-spots. The hybrid structure showed a strong chiroptical signal, which was proved in both experiment and simulation. We expect that this coupling method for molecule and chiral hot-spot will provide a versatile route to modulate the chiroptical environment for the various types of molecules.
|
