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Strong coupling among semiconductor quantum dots induced by a metal nanoparticle

Based on cavity quantum electrodynamics (QED), we investigate the light-matter interaction between surface plasmon polaritons (SPP) in a metal nanoparticle (MNP) and the excitons in semiconductor quantum dots (SQDs) in an SQD-MNP coupled system. We propose a quantum transformation method to strongly... Full description

Journal Title: Nanoscale Research Letters 2012, Vol.7(1), pp.1-6
Main Author: He, Yong
Other Authors: Zhu, Ka-Di
Format: Electronic Article Electronic Article
Language: English
Subjects:
ID: ISSN: 1931-7573 ; E-ISSN: 1556-276X ; DOI: 10.1186/1556-276X-7-95
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recordid: springer_jour10.1186/1556-276X-7-95
title: Strong coupling among semiconductor quantum dots induced by a metal nanoparticle
format: Article
creator:
  • He, Yong
  • Zhu, Ka-Di
subjects:
  • Semiconductor Industry -- Analysis
ispartof: Nanoscale Research Letters, 2012, Vol.7(1), pp.1-6
description: Based on cavity quantum electrodynamics (QED), we investigate the light-matter interaction between surface plasmon polaritons (SPP) in a metal nanoparticle (MNP) and the excitons in semiconductor quantum dots (SQDs) in an SQD-MNP coupled system. We propose a quantum transformation method to strongly reveal the exciton energy shift and the modified decay rate of SQD as well as the coupling among SQDs. To obtain these parameters, a simple system composed of an SQD, an MNP, and a weak signal light is designed. Furthermore, we consider a model to demonstrate the coupling of two SQDs mediated by SPP field under two cases. It is shown that two SQDs can be entangled in the presence of MNP. A high concurrence can be achieved, which is the best evidence that the coupling among SQDs induced by SPP field in MNP. This scheme may have the potential applications in all-optical plasmon-enhanced nanoscale devices.
language: eng
source:
identifier: ISSN: 1931-7573 ; E-ISSN: 1556-276X ; DOI: 10.1186/1556-276X-7-95
fulltext: fulltext_linktorsrc
issn:
  • 1556-276X
  • 1556276X
  • 1931-7573
  • 19317573
url: Link


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descriptionBased on cavity quantum electrodynamics (QED), we investigate the light-matter interaction between surface plasmon polaritons (SPP) in a metal nanoparticle (MNP) and the excitons in semiconductor quantum dots (SQDs) in an SQD-MNP coupled system. We propose a quantum transformation method to strongly reveal the exciton energy shift and the modified decay rate of SQD as well as the coupling among SQDs. To obtain these parameters, a simple system composed of an SQD, an MNP, and a weak signal light is designed. Furthermore, we consider a model to demonstrate the coupling of two SQDs mediated by SPP field under two cases. It is shown that two SQDs can be entangled in the presence of MNP. A high concurrence can be achieved, which is the best evidence that the coupling among SQDs induced by SPP field in MNP. This scheme may have the potential applications in all-optical plasmon-enhanced nanoscale devices.
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titleStrong coupling among semiconductor quantum dots induced by a metal nanoparticle
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abstractBased on cavity quantum electrodynamics (QED), we investigate the light-matter interaction between surface plasmon polaritons (SPP) in a metal nanoparticle (MNP) and the excitons in semiconductor quantum dots (SQDs) in an SQD-MNP coupled system. We propose a quantum transformation method to strongly reveal the exciton energy shift and the modified decay rate of SQD as well as the coupling among SQDs. To obtain these parameters, a simple system composed of an SQD, an MNP, and a weak signal light is designed. Furthermore, we consider a model to demonstrate the coupling of two SQDs mediated by SPP field under two cases. It is shown that two SQDs can be entangled in the presence of MNP. A high concurrence can be achieved, which is the best evidence that the coupling among SQDs induced by SPP field in MNP. This scheme may have the potential applications in all-optical plasmon-enhanced nanoscale devices.
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