Abstract
The appearance of a self-reflected wave inside a dense saturable absorber has been predicted as a novel nonlinear optical effect.1 In this concept a laser beam saturates the absorption in a surface layer, which allows the light to penetrate into the medium. Subsequently, a boundary between areas of low and high absorption is established leading to a self-reflected wave. Very recently, an extended analysis2 showed that an excitation with ultra-short laser pulses can result in a moving absorption front. For high front velocities this leads to a Doppler shift of the self-reflected light serving as a direct evidence for the dynamic nonlinear optical skin effect
© 1997 Optical Society of America
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