[16a-P07-1~24] 3.11 Nanoscale optical science and near-field optics

[16a-P07-8] Photoluminescence Enhancement of Carbon Dots Placed in Plasmonic Nanogaps

〇Yuto Masuda¹, Keisuke Imaeda², Sou Ryuzaki², Kosei Ueno² (1.Grad. Sch. Chem. Sci. and Eng., Hokkaido Univ., 2.Dept. Chem., Fac. Sci., Hokkaido Univ.)

Keywords:

plasmon,carbon dots,purcell effects

The low photoluminescence quantum yield of red light-emitting carbon dots (CDs) has hindered their use in light-emitting devices. In this study, the emission process of CDs was controlled by a remarkable near-field enhancement effect within the nanogap of Au nanodimers. The CDs were placed within the nanogap region by two-photon photopolymerization of SU-8, a negative photoresist. This method resulted in the highest CD emission intensity and the shortest CD emission lifetime in the nanogaps with the highest near-field intensity. It was shown that the near-field intensity is important in controlling the CD emission process.