[11p-PB1-1~40] 3.12 Nanoscale optical science and near-field optics

[11p-PB1-6] Enhancement of Photoluminescence from Thin Layers of CdSe/ZnS Quantum Dots by means of Surface Plasmon Resonance

〇Toshiki Nakamura¹, Fumiya Murao¹, Tetsuya Matsuyama¹, Kenji Wada¹, Koichi Okamoto¹ (1.Engineering,Osaka Pref. Univ.)

Keywords:plasmon, Quantum Dots, thin metal layers

Blue emissions from thin layers of CdSe/ZnS quantum dots are enhanced by surface plasmon resonance on metal substrates. Enhancements were obtained for both silver and aluminum thin layers with 50 nm-thick with the SiO₂ thin layers. In the case of silver thin layers with 15 nm-thick, it turned from quenching to enhancement with the change of the surface structure by thermal annealing of the substrate at 200 ℃. Further enhancement was obtained by depositing a SiO₂ thin layers on the metal surface by a sputter coater. On the other hand, enhancement was observed in the case of aluminum thin layers with 15 nm-thick, and further enhancements were obtained for both with the thermal annealing and the SiO₂ thin layers.