Coupling Single Giant Nanocrystal Quantum Dots to
Post# of 22465
Posted On: 11/21/2015 10:10:57 PM
Coupling Single Giant Nanocrystal Quantum Dots to the Fundamental Mode of Patch Nanoantennas through Fringe Field
Feng Wang, Niladri S. Karan, Hue Minh Nguyen, Yagnaseni Ghosh, Jennifer A. Hollingsworth & Han Htoon
"The fabrication process involves sputtering of 120 nm thick Au layer onto a cleaned fused silica substrate followed by spin coating of a ~200 nm thick PMMA (950 A4) film to define the lateral dimensions of the patches by e-beam lithography. After resist development and a slight plasma etching, 30 nm thick SiO2 and Au were then consecutively deposited by electron-beam evaporation and sputtering respectively. A standard lift-off process is finally applied to obtain patch antenna arrray. The silica coated non-blinking g-NQDs are then deposited onto the antenna. These g-NQDs have a 4-nm CdSe core overcoated with a 16-monolayer CdS shell and a 10–12-nm-thick SiO2 shell in sequence"
"We have also demonstrated that, without enhancing the laser excitation and quenching the single exciton emission, the bi-exciton quantum yield of single g-NQDs can be effectively enhanced by fringe coupling to the patch nanoantennas."
http://www.nature.com/articles/srep14313
Feng Wang, Niladri S. Karan, Hue Minh Nguyen, Yagnaseni Ghosh, Jennifer A. Hollingsworth & Han Htoon
"The fabrication process involves sputtering of 120 nm thick Au layer onto a cleaned fused silica substrate followed by spin coating of a ~200 nm thick PMMA (950 A4) film to define the lateral dimensions of the patches by e-beam lithography. After resist development and a slight plasma etching, 30 nm thick SiO2 and Au were then consecutively deposited by electron-beam evaporation and sputtering respectively. A standard lift-off process is finally applied to obtain patch antenna arrray. The silica coated non-blinking g-NQDs are then deposited onto the antenna. These g-NQDs have a 4-nm CdSe core overcoated with a 16-monolayer CdS shell and a 10–12-nm-thick SiO2 shell in sequence"
"We have also demonstrated that, without enhancing the laser excitation and quenching the single exciton emission, the bi-exciton quantum yield of single g-NQDs can be effectively enhanced by fringe coupling to the patch nanoantennas."
http://www.nature.com/articles/srep14313
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