Plasmonics

, Volume 8, Issue 2, pp 657–664 | Cite as

Plasmonic Tuning of Photoluminescence from Semiconducting Quantum Dot Assemblies

Article
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Abstract

We report tuning of photoluminescence enhancement and quenching from closed packed monolayers of cadmium selenide quantum dots doped with gold nanoparticles. Plasmon-mediated control of the emission intensity from the monolayers is achieved by varying the size and packing density of the quantum dots as well as the doping concentration of gold nanoparticles. We observe a unique packing density dependent crossover from enhancement to quenching and vice versa for fixed size of quantum dots and doping concentration of gold nanoparticles. We suggest that this behavior is indicative of a crossover from single particle to collective emission from quantum dots mediated by gold nanoparticles.

Keywords

Quantum dots Gold nanoparticle Exciton–plasmon coupling Hybrid nanoassemblies 
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Notes

Acknowledgements

We acknowledge the Department of Science and Technology (Nanomission), India for the financial support and the Advanced Facility for Microscopy and Microanalysis, Indian Institute of Science, Bangalore for the access to TEM measurements. M. Praveena acknowledges UGC, India for the financial support.

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Copyright information

© Springer Science+Business Media, LLC 2012

Authors and Affiliations

  1. 1.Department of PhysicsIndian Institute of ScienceBangaloreIndia

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