Journal
OPTICAL MATERIALS EXPRESS
Volume 2, Issue 8, Pages 1026-1039Publisher
OPTICAL SOC AMER
DOI: 10.1364/OME.2.001026
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Funding
- National Science Foundation (NSF) [HRD-0734635, HRD-1137747, EEC-0647452]
- Army Research Office (ARO) [W911NF-11-1-0177]
- National Institutes of Health (NIH) [R01EB12003, 5R21CA14897]
- National 863 Project of China [2011AA050509]
- Division Of Human Resource Development
- Direct For Education and Human Resources [1137747] Funding Source: National Science Foundation
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A hybrid optical nanostructure of plasmon-coupled SQDs was developed for photonic applications. The coupling distances between the mono-layers of Au nanoparticles with a surface concentration of similar to 9.18 x 10(-4) nm(-2) and CdSe/ZnS SQDs with that of similar to 3.7 x 10(-3) nm(-2) were controlled by PMMA plasma etching. Time-resolved spectroscopy of plasmon-coupled SQDs revealed a strong shortening of the longest lifetime and similar to 9-fold PL enhancement. Polarization-resolved PL spectroscopy displayed linear polarization and depolarization at near- and far-field plasmon-coupling, respectively. The physical origin of PL enhancement could be attributable to both the large local field enhancement and the fast resonant energy transfer. (C)2012 Optical Society of America
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