Strong coupling is a natural phenomenon that exists in two or more systems. When strong coupling occurs, the characteristics of the system in some aspects will be greatly different from the original characteristics, such as optical response, electrical response and vibration response. There will be obvious changes in the strong coupling. Due to the lack of in-depth study of such phenomena at this stage, it is difficult to fully apply it in practical problems. However, many changes in material properties have a great application in the case of strong coupling. Potential, for example, studies have shown that the strong coupling phenomenon can be used to modify the chemical reaction rate and fluorescence spectral characteristics of biotech materials to meet the required requirements.
The Remo Task Force of the Cixi Medical Institute of the Institute of Materials Technology and Engineering, Chinese Academy of Sciences, cooperated with the Italian Institute of Technology (IIT), Louisiana State University (USA) and Jilin University of China to study the changes in J-polymers. The effect of a part of the concentration on the strong coupling phenomenon, in-depth understanding of the mechanism of strong coupling. Specifically, the researchers obtained the optimal Rabi split (high coupling strength) by following static and dynamic research methods. Conditions. The results of this study have important implications for transforming the strong coupling phenomenon from basic science to applied science, and provide guidance for subsequent research. In this study, the results from dynamic analysis indicate that A complete set of models that predict the characteristics of such systems over time is critical to the application of strong coupling phenomena.
Figure 1 shows the strong coupling phenomenon between nanostructured devices and J-polymer molecules. Figure 1 (left) is an SEM image of nanostructured devices. It can be seen that nanopores are regularly arranged on the surface of the gold plate. The image is also included in the figure. The nanodevice has a similar wavelength response (about 630 nm) to the J-polymer molecule. The absorption peak and absorption peak intensity of the J-polymer vary with concentration. The peak position is around 630 nm, and the intensity of the absorption peak increases with the increase of concentration. Figure 1 (right) is the absorption spectrum of the J-polymer combined with the nanodevice. It can be seen that the absorption peak of the intrinsic material disappears. The newly emerging absorption peak is between 570-600 nm and 650-700 nm, and the absorption peak position is more split with the increase of polymer concentration. In recent years, the research on the enhancement mechanism of this split has become a hot spot. The results of this research will provide guidance for subsequent research.
The results have been published in the academic journal Nanoscale under the title "The role of Rabi splitting tuning in the dynamics of strongly coupled J-aggregates and surface plasmon polaritons in nanohole arrays (DOI: 10.1039/C6NR01588C).
Figure 1 SEM image of nanostructured device (left) and absorption spectrum after combination of J-polymer and nanodevice
