Sub and Super-Luminal Propagation of Intense Pulses in Media with Saturated and Reverse Absorption
G. S. Agarwal, T. N. Dey
Abstract
We develop models for the propagation of intense pulses in solid state media which can have either saturated absorption or exhibit reverse absorption . We show that the experiments of Bigelow et al.[Phys. Rev. Lett. 90, 113903 (2003); Science 301, 200 (2003).] on subluminal propagation in Ruby and superluminal propagation in Alexandrite are well explained by modelling them as three level and four level systems coupled to Maxwell equations. We present results well beyond the traditional pump-probe approach.
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