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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 10 — May. 7, 2012
  • pp: 10712–10720

Resonant gain suppression and superluminal group velocity in a multilevel system

Cui-Li Cui, Chang-Bao Fu, Hong Yang, Qian-Qian Bao, Huai-Liang Xu, and Jin-Hui Wu  »View Author Affiliations

Optics Express, Vol. 20, Issue 10, pp. 10712-10720 (2012)

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We investigate the interaction of an open (N + 1)-level extended V-type atomic system (i.e. a closed (N + 2)-level atomic system) with N coherent laser fields and one incoherent pumping field through both analytical and numerical calculations. Our results show that the system can exhibit multiple resonant gain suppressions via perfect quantum destructive interference, which is usually believed to be absent in closed three-level V system and its extended versions involving more atomic levels, with at most N – 1 transparency windows associated with very steep anomalous dispersions occurring in the system. The superluminal group velocity of the probe-laser pulse with at most N – 1 negative values can also be generated and controlled with little gain or absorption.

© 2012 OSA

OCIS Codes
(270.0270) Quantum optics : Quantum optics
(270.1670) Quantum optics : Coherent optical effects

ToC Category:
Quantum Optics

Original Manuscript: February 16, 2012
Revised Manuscript: April 4, 2012
Manuscript Accepted: April 4, 2012
Published: April 24, 2012

Cui-Li Cui, Chang-Bao Fu, Hong Yang, Qian-Qian Bao, Huai-Liang Xu, and Jin-Hui Wu, "Resonant gain suppression and superluminal group velocity in a multilevel system," Opt. Express 20, 10712-10720 (2012)

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