Document Type : Original Article
Authors
Department of Physics, Faculty of Science, Razi University
Abstract
In this paper, the generation of second-harmonic from a hybrid molecule composed of two metal nanoparticles with
ellipsoidal shape coupled to a semiconductor quantum dot when a control laser field is applied to the system by using
the density matrix approach is investigated. This applied field induces a polarization in the semiconductor quantum dot
and both different plasmonic nanoparticles, and the polarized metal nanoparticles interact with the quantum dot through
dipole–dipole interaction. We demonstrate that SHG strongly depends on the shape factor and the light polarization for
oblate and prolate spheroidal plasmonic nanoparticles coupled with quantum dot when the applied field is parallel or
perpendicular to the axis of the system. The study of the light-matter interaction in such hybrid molecule can
useful to design the optical devices based on the plasmon-exciton-plasmon interaction.
Keywords
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