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research article

Optical injection of charge current in quantum wires: oscillations induced by excitonic effects

Marti, D. H.  
•
Dupertuis, M. A.  
•
Deveaud-Plédran, B.  
2005
Physical Review B

We investigate the charge current that is optically injected by interference between one- and two-photon excitation in the presence of excitonic effects. We consider a realistic V-shaped quantum wire excited slightly below the band gap by two simultaneous femtosecond laser pulses of frequency 2 and that interact, respectively, with the lowest B1 and A1 excitons. Using effective multiband Bloch equations for two-photon transitions, including the Coulomb interaction within the Hartree-Fock approximation, we show that, because of the different symmetry properties of the involved excitons, the generated charge current displays oscillations due to the quantum interference between the excitonic coherences.

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Type
research article
DOI
10.1103/PhysRevB.72.075357
Web of Science ID

WOS:000231564500144

Author(s)
Marti, D. H.  
Dupertuis, M. A.  
Deveaud-Plédran, B.  
Date Issued

2005

Published in
Physical Review B
Volume

72

Issue

7

Article Number

075357

Subjects

quantum wires

•

charge current

•

optical injection

•

spin current

•

excitons

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
LOEQ  
Available on Infoscience
September 26, 2007
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/12441
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