Chin. J. Semicond. > 2007, Volume 28 > Issue 3 > 404-409

PAPERS

Dynamic Behavior of Excitons in Coupled Double Quantum Dots Driven by DC-AC Electric Fields

Su Xiyu, Quan Xiumei and Guo Dejun

+ Author Affiliations

PDF

Abstract: With a two-site Hubbard model and the Floquet theory,the dynamic behavior of excitons in coupled double quantum dots driven by DC-AC electric fields is investigated.The time-dependent Schrdinger equation is numerically solved,and Pmin,the minimum probability for the electron and the hole to remain in the initial localized state within 20 periods of the external field,is given.Results show that for a weak field,the exciton mainly oscillates between two localized states;however,for a strong field,the electron and the hole can independently tunnel between the two quantum dots.The driving field tends to drive the electron and the hole apart,and under appropriate conditions they can be localized in the initial state for a short time.The DC field breaks the dynamic symmetry of the system and affects the dynamic localization.

Key words: Floquet theoryquasi-energylocalized statesdynamical localization

  • Search

    Advanced Search >>

    Article Metrics

    Article views: 2563 Times PDF downloads: 1776 Times Cited by: 0 Times

    History

    Received: 18 August 2015 Revised: 23 November 2006 Online: Published: 01 March 2007

    Catalog

      Email This Article

      User name:
      Email:*请输入正确邮箱
      Code:*验证码错误
      Su Xiyu, Quan Xiumei, Guo Dejun. Dynamic Behavior of Excitons in Coupled Double Quantum Dots Driven by DC-AC Electric Fields[J]. Journal of Semiconductors, 2007, In Press. Su X Y, Quan X M, Guo D J. Dynamic Behavior of Excitons in Coupled Double Quantum Dots Driven by DC-AC Electric Fields[J]. Chin. J. Semicond., 2007, 28(3): 404.Export: BibTex EndNote
      Citation:
      Su Xiyu, Quan Xiumei, Guo Dejun. Dynamic Behavior of Excitons in Coupled Double Quantum Dots Driven by DC-AC Electric Fields[J]. Journal of Semiconductors, 2007, In Press.

      Su X Y, Quan X M, Guo D J. Dynamic Behavior of Excitons in Coupled Double Quantum Dots Driven by DC-AC Electric Fields[J]. Chin. J. Semicond., 2007, 28(3): 404.
      Export: BibTex EndNote

      Dynamic Behavior of Excitons in Coupled Double Quantum Dots Driven by DC-AC Electric Fields

      • Received Date: 2015-08-18
      • Accepted Date: 2006-10-01
      • Revised Date: 2006-11-23
      • Published Date: 2007-03-06

      Catalog

        /

        DownLoad:  Full-Size Img  PowerPoint
        Return
        Return