Slow light and superluminality in Kerr media without a pump |
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Authors: | Yang Qiguang Seo Jae Tae Tabibi Bagher Wang Huitian |
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Institution: | Department of Physics, Hampton University, Hampton, Virginia 23668, USA. qiguang.yang@hamptonu.edu |
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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. |
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