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Optics Letters

Optics Letters


  • Editor: Anthony J. Campillo
  • Vol. 31, Iss. 16 — Aug. 15, 2006
  • pp: 2486–2488

Superluminal light propagation assisted by Zeeman coherence

Huijuan He, Zhengfeng Hu, Yuzhu Wang, Ligang Wang, and Shiyao Zhu  »View Author Affiliations

Optics Letters, Vol. 31, Issue 16, pp. 2486-2488 (2006)

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We have observed a dispersionlike absorption (or gain) spectrum at the D1 transition in a Rb vapor cell filled with a buffer gas, due to Zeeman coherence of the ground states in a double Λ configuration. Meanwhile, we have also observed superluminal pulse propagation. It is experimentally demonstrated that the front speed of a light pulse still equals the light speed c in vacuum, although the group velocity of the light pulse is ( 2.2 ± 0.6 ) × 10 4 m s .

© 2006 Optical Society of America

OCIS Codes
(270.1670) Quantum optics : Coherent optical effects
(270.5530) Quantum optics : Pulse propagation and temporal solitons

ToC Category:
Quantum Optics

Original Manuscript: March 23, 2006
Revised Manuscript: May 21, 2006
Manuscript Accepted: June 6, 2006
Published: July 25, 2006

Huijuan He, Zhengfeng Hu, Yuzhu Wang, Ligang Wang, and Shiyao Zhu, "Superluminal light propagation assisted by Zeeman coherence," Opt. Lett. 31, 2486-2488 (2006)

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