We are exploring a new frontier in materials chemistry from the viewpoint of ultrafast dynamics, peculiar electronic excitation generated by ionizing radiations, and nanostructures. At the moment, we are mainly focusing on the development of novel scintillation materials, which can be used to manufacture radiation sensors. Our aim is to develop excellent scintillation materials in order to manufacture a novel high-quality detector that can very accurately determine arrival time of ionizing radiation, i.e., a detector with a very high time resolution. We have already developed a detector that exhibits a time resolution of less than 100 ps (= 10 billionth of a second), which in the best time resolution reported so far.. Our unique approach allow the production of novel high-quality scintillation materials.

Control ling the electronic states is very important in the development of scintillation materials, because the scintillation process is dependent on the nature of the electronic states. We have been employing nanotechnology to achieve this control. One example is the development of organic-inorganic perovskite-type compounds, in which a two-dimensional structure (quantum well) is naturally formed. We have succeeded in developing novel high-quality scintillation materials, and these materials have attracted much attention from researchers and potential users. This was the first successful development of scintillation materials by utilizing the quantum confinement effect. At present, by using various fabrication methods, we are developing novel materials of higher quality for practical use. These high-quality materials will greatly contribute to advances in basic science and industrial applicationsy.

We are investing considerable efforts to develop materials having the best quality in the world. In the course of our daily research activities, we often encounter unprecedented results. This is a major source of inspiration that motivates us to conduct further studies and has helped us carry out pioneering research in this unexplored field of science. The vast universe of science can benefit from our diligence and enthusiasm.