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Photon-assistant fano resonance in serially coupled triple quantum dots

Based on calculations of the electronic structure of serially coupled triple quantum dots (left, middle, right dots) (STQDs), we study the transport properties of the system driven by an ac electric field. It is found that the -type energy level of STQDs has great impact on the transport properties.... Full description

Journal Title: Journal of Physics: Condensed Matter 2008, Vol.20(32), p.325223 (5pp)
Main Author: Xie, Wanyuan
Other Authors: Chu, Weidong , Zhang, Wei , Duan, Suqing
Format: Electronic Article Electronic Article
Language: English
Subjects:
ID: ISSN: 0953-8984 ; E-ISSN: 1361-648X ; DOI: 10.1088/0953-8984/20/32/325223
Link: http://dx.doi.org/10.1088/0953-8984/20/32/325223
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recordid: iop10.1088/0953-8984/20/32/325223
title: Photon-assistant fano resonance in serially coupled triple quantum dots
format: Article
creator:
  • Xie, Wanyuan
  • Chu, Weidong
  • Zhang, Wei
  • Duan, Suqing
subjects:
  • Condensed Matter - Mesoscale And Nanoscale Physics
ispartof: Journal of Physics: Condensed Matter, 2008, Vol.20(32), p.325223 (5pp)
description: Based on calculations of the electronic structure of serially coupled triple quantum dots (left, middle, right dots) (STQDs), we study the transport properties of the system driven by an ac electric field. It is found that the -type energy level of STQDs has great impact on the transport properties. For an asymmetric (between left and right dots) configuration, there is a symmetric peak in the current-AC frequency curve due to resonant photon induced mixing between the left/right dot and the middle dot. In the symmetric (between left and right dots) configuration, a Fano asymmetric line shape appears in the current-frequency curve with the help of a trapping dark state. Here the interesting coherent trapping phenomena, which usual appear in quantum optics, play an essential role in quantum electronic transport. We provide a clear physics picture for the Fano resonance and convenient ways to tune the Fano effects.
language: eng
source:
identifier: ISSN: 0953-8984 ; E-ISSN: 1361-648X ; DOI: 10.1088/0953-8984/20/32/325223
fulltext: fulltext
issn:
  • 0953-8984
  • 1361-648X
  • 09538984
  • 1361648X
url: Link


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descriptionBased on calculations of the electronic structure of serially coupled triple quantum dots (left, middle, right dots) (STQDs), we study the transport properties of the system driven by an ac electric field. It is found that the -type energy level of STQDs has great impact on the transport properties. For an asymmetric (between left and right dots) configuration, there is a symmetric peak in the current-AC frequency curve due to resonant photon induced mixing between the left/right dot and the middle dot. In the symmetric (between left and right dots) configuration, a Fano asymmetric line shape appears in the current-frequency curve with the help of a trapping dark state. Here the interesting coherent trapping phenomena, which usual appear in quantum optics, play an essential role in quantum electronic transport. We provide a clear physics picture for the Fano resonance and convenient ways to tune the Fano effects.
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abstractBased on calculations of the electronic structure of serially coupled triple quantum dots (left, middle, right dots) (STQDs), we study the transport properties of the system driven by an ac electric field. It is found that the -type energy level of STQDs has great impact on the transport properties. For an asymmetric (between left and right dots) configuration, there is a symmetric peak in the current-AC frequency curve due to resonant photon induced mixing between the left/right dot and the middle dot. In the symmetric (between left and right dots) configuration, a Fano asymmetric line shape appears in the current-frequency curve with the help of a trapping dark state. Here the interesting coherent trapping phenomena, which usual appear in quantum optics, play an essential role in quantum electronic transport. We provide a clear physics picture for the Fano resonance and convenient ways to tune the Fano effects.
doi10.1088/0953-8984/20/32/325223
date2008-08-13