Abstract

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)×104ms.

© 2006 Optical Society of America

Full Article  |  PDF Article
Related Articles
Absorption resonance and large negative delay in rubidium vapor with a buffer gas

Eugeniy E. Mikhailov, Vladimir A. Sautenkov, Yuri V. Rostovtsev, and George R. Welch
J. Opt. Soc. Am. B 21(2) 425-428 (2004)

Influence of a buffer gas on nonlinear magneto-optical polarization rotation

Irina Novikova, Andrey B. Matsko, and George R. Welch
J. Opt. Soc. Am. B 22(1) 44-56 (2005)

Arbitrarily copropagating superluminal and slow light by controllable one-photon detuning in trapped cold atoms

Yanting Zhao, Jie Ma, Xianli Zhang, Lirong Wang, Liantuan Xiao, and Suotang Jia
Opt. Express 16(7) 4747-4752 (2008)

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Figures (5)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Metrics

You do not have subscription access to this journal. Article level metrics are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription