Plasmonic tuning of photoluminescence from semiconducting quantum dot assemblies

Tripathi, LN and Praveena, M and Basu, JK (2013) Plasmonic tuning of photoluminescence from semiconducting quantum dot assemblies. In: Plasmonics, 8 (2). pp. 657-664.

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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.

Item Type:	Journal Article
Publication:	Plasmonics
Publisher:	Springer
Additional Information:	Copyright of this article belongs to Springer.
Keywords:	Quantum Dots; Gold Nanoparticle; Exciton-Plasmon Coupling; Hybrid Nanoassemblies
Department/Centre:	Division of Physical & Mathematical Sciences > Physics
Date Deposited:	16 Aug 2013 07:41
Last Modified:	16 Aug 2013 07:41
URI:	http://eprints.iisc.ac.in/id/eprint/46986

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