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Title: Ultrafast single-electron transfer in coupled quantum dots driven by a few-cycle chirped pulse

We theoretically study the ultrafast transfer of a single electron between the ground states of a coupled double quantum dot (QD) structure driven by a nonlinear chirped few-cycle laser pulse. A time-dependent Schrödinger equation without the rotating wave approximation is solved numerically. We demonstrate numerically the possibility to have a complete transfer of a single electron by choosing appropriate values of chirped rate parameters and the intensity of the pulse. Even in the presence of the spontaneous emission and dephasing processes of the QD system, high-efficiency coherent transfer of a single electron can be obtained in a wide range of the pulse parameters. Our results illustrate the potential to utilize few-cycle pulses for the excitation in coupled quantum dot systems through the nonlinear chirp parameter control, as well as a guidance in the design of experimental implementation.
Authors:
 [1] ;  [2] ;  [3] ;  [1] ;  [4]
  1. Department of Physics, Southeast University, Nanjing 210096 (China)
  2. (China)
  3. Department of Applied Physics, School of Basic Science, East China Jiaotong University, Nanchang 330013 (China)
  4. Institute of Photonics Technologies, National Tsing-Hua University, Hsinchu 300, Taiwan (China)
Publication Date:
OSTI Identifier:
22273615
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 115; Journal Issue: 14; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
77 NANOSCIENCE AND NANOTECHNOLOGY; APPROXIMATIONS; EFFICIENCY; ELECTRON TRANSFER; ELECTRONS; EXCITATION; GROUND STATES; LASER RADIATION; NONLINEAR PROBLEMS; PHOTON EMISSION; PULSES; QUANTUM DOTS; SCHROEDINGER EQUATION; TIME DEPENDENCE