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Slow light and superluminality in Kerr media without a pump.

作者信息

Yang Qiguang, Seo Jae Tae, Tabibi Bagher, Wang Huitian

机构信息

Department of Physics, Hampton University, Hampton, Virginia 23668, USA.

出版信息

Phys Rev Lett. 2005 Aug 5;95(6):063902. doi: 10.1103/PhysRevLett.95.063902. Epub 2005 Aug 4.

DOI:10.1103/PhysRevLett.95.063902
PMID:16090955
Abstract

Subluminal and superluminal propagation of a light pulse in Kerr materials has been investigated. Group velocities as slow as much less than 1 mm per second to as fast as negative several thousands meters per second can easily be obtained in the Kerr medium, which possesses a large nonlinear refractive index and long relaxation time, such as Cr3+-doped alexandrite, ruby, and GdAlO3. The physical mechanism is the strong highly dispersive coupling between different frequency components of the pulse.

摘要

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