Abstract

In an open /\ type system with the spontaneously generated coherence (SGC), when the probe and driving fields have different frequencies, the switching of the group velocity of the probe pulse from subluminal to superluminal is realized not only by adjusting values of the relative phase between the probe and driving fields but also by varying values of the incoherent pumping rate. For the subluminal propagation, the system always exhibits the probe absorption, however, the superluminal propagation is always companied with gain of the probe field.

© 2005 Chinese Optics Letters

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Chin. Opt. Lett. (3)

J. Modern Opt. (1)

X. J. Fan, J. J. Li, S. F. Tian, N. Cui, H. Li, A. Y. Li, and Z. Z. Xu, J. Modern Opt. 52, 1757 (2005).

Opt. Commun. (3)

E. Paspalakis, S.-Q. Gong, and P. L. Knight, Opt. Commun. 152, 293 (1998).

H.-M. Ma, S.-Q. Gong, C.-P. Liu, Z.-R. Sun, and Z.-Z. Xu, Opt. Commun. 223, 97 (2003).

C.-P. Liu, S.-Q. Gong, X.-J. Fan, and Z.-Z. Xu, Opt. Commun. 239, 383 (2004).

Phys. Lett. A (1)

S.-Q. Gong, Y. Li, S.-D. Du, and Z.-Z. Xu, Phys. Lett. A 259, 43 (1999).

Phys. Rev. A (6)

J.-H. Wu and J.-Y. Gao, Phys. Rev. A 65, 063807 (2002).

H. Kang, G. Hernandez, and Y. Zhu, Phys. Rev. A 70, 011801 (2004).

M. Sahrai, H. Tajalli, K. T. Kapale, and M. S. Zubairy, Phys. Rev. A 70, 023813 (2004).

G. S. Agarwal, T. N. Dey, and S. Menon, Phys. Rev. A 64, 053809 (2001).

D. Bortman-Arbiv, A. D. Wilson-Gordon, and H. Friedmann, Phys. Rev. A 63, 043818 (2001).

A. Dogariu, A. Kuzmich, and L. J. Wang, Phys. Rev. A 63, 053806 (2001).

Phys. Rev. E (1)

L.-G. Wang, N.-H. Liu, Q. Lin, and S.-Y. Zhu, Phys. Rev. E 68, 066606 (2003).

Phys. Rev. Lett. (4)

D. Budker, D. F. Kimball, S. M. Rochester, and V. V. Yashchuk, Phys. Rev. Lett. 83, 1767 (1999).

M. M. Kash, V. A. Sautenkov, A. S. Zibrov, L. Hollberg, G. R. Welch, M. D. Lukin, Y. Rostovtsev, E. S. Fry, and M. O. Scully, Phys. Rev. Lett. 82, 5229 (1999).

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A. Kuzmich, A. Dogariu, L. J. Wang, P. W. Milonni, and R. Y. Chiao, Phys. Rev. Lett. 86, 3925 (2001).

Process in Optics (1)

R. W. Boyd and D. J. Gauthier, Process in Optics 43, 497 (2002).

Progress in Optics (1)

R. Y. Chiao and A. M. Steinberg, Progress in Optics 37, 345 (1997).

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