抄録
Offer Organization: Japan Society for the Promotion of Science, System Name: Grants-in-Aid for Scientific Research, Category: Grant-in-Aid for Challenging Research (Exploratory), Fund Type: -, Overall Grant Amount: - (direct: 5000000, indirect: 1500000)
Afterglow emission allows imaging independent of autofluorescence under ambient conditions. Although higher resolution afterglow is crucial for increasing quality of the autofluorescence-free emission imaging, increase of excitation intensity to allow brighter afterglow emission induces a decrease of the resolution of afterglow images. Therefore, procedure and mechanism of materials to allow afterglow imaging with more higher-resolution capability is neccesary. Here, we report photoinduced triplet depletion and improved resolution of bright afterglow emission using depletion. Triplet excitons accumulated in a solid material by excitation were depleted under irradiation with a depletion beam with a longer wavelength than the absorption wavelength of the material. A higher-resolution afterglow image was observed by simultaneously focusing a donut-shaped depletion beam and an excitation beam.