[23a-E303-1~11] 3.12 Nanoscale optical science and near-field optics

[23a-E303-2] Control of Antenna Effect Based on the Emission Enhancement of fluorescent nanoparticle with Bull’s eye-Type Plasmonic Chips

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

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

Bull's eye structure composed of concentric circles in plasmonic chip has an antenna effect. In this study, we attempted to show and control an antenna effect of the fluorescent nanoparticles on the plasmonic chip by the emission enhancement effect. The fluorescence image obtained under the observation conditions with only emission enhancement showed a clear antenna effect with a low magnification objective lens. This is thought to be dependent on the relationship between the resonance angle in the emission wavelength range and the detection angle range determined by the aperture of the objective lens.