[12p-N202-1~13] 3.12 Nanoscale optical science and near-field optics

[12p-N202-4] Enhanced Fluorescence Antenna Effect Depending on Center Structure of Bull’s eye Plasmonic Chips

〇Tomoya Nagasue¹, Takeha Shinohara¹, Seiju Hasegawa², Kohei Imura², Keiko Tawa¹ (1.Kwansei Gakuin Univ., 2.Waseda Univ.)

Keywords:fluorescence microscopy, surface plasmon resonance, Bull's eye structure

Bull's eye type- plasmonic chips composed of concentric circle structure can utilize incident light with all azimuthal angles from the objective lens for plasmon coupling under a microscope with Köhler illumination, and in particular, electric field enhancement at the center of the bull's eye, that is, antenna effect, is expected. In this study, we used four kinds of Bull’s eye-plasmonic chips with different sizes and irregularities of the central structure to investigate the relationship between the central structure and the enhancement from the fluorescence images of fluorescent nanoparticles adsorbing to the chip surface. And also, the antenna effect depending on the central structure was studied.