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Coherent effects in quantum dot-metallic nanoparticle systems: plasmonic induction of Rabi oscillation and ultra-high field enhancement

Published online by Cambridge University Press:  18 March 2013

S. M. Sadeghi
S. M. Sadeghi*
Affiliation:
Department of Physics, University of Alabama in Huntsville, Huntsville, AL 35899, USA Nano and Micro Device Center, University of Alabama in Huntsville, Huntsville, AL 35899, USA
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Abstract

We theoretically show when single hybrid systems consisting of a metallic nanoparticle and a semiconductor quantum dot interact with a coherent light source (a laser field), quantum coherence in the quantum dot can dramatically influence the plasmonic field of the metallic nanoparticle. As a result, the quantum dot can self-renormalize the plasmonic field that it experiences. Using this we show when the applied laser field has a step-like amplitude rise, the effective field experienced by the quantum dot can exhibit strong oscillations with significantly high amplitudes for a short period of time. Our results also reveal the correlation between this effect and the Rabi flopping induced by plasmonic effects when a quantum dot is in the vicinity of a metallic nanoparticle. These results suggest that in a quantum dot-metallic nanoparticle system quantum coherence not only can change the magnitude of the field that the quantum dot experiences, but also, compared to the applied field, it can significantly increase the rate of its time variations. The results suggest that quantum dot-metallic nanoparticle systems can be appealing host for investigation of quantum plasmonic effects and photonic-plasmonic devices.

Keywords

nanostructureoptical propertiessimulation
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1509: Symposium CC – Optically Active Nanostructures , 2013 , mrsf12-1509-cc08-02
Copyright
Copyright © Materials Research Society 2013

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