Abstract
The parametric interaction of three waves, one of which travel in direction opposite to other, is associated with a number of unusual phenomena that find their applications. One of such phenomena is an extremely long transient process of amplitude changing of the output signal. In this paper, the impact of pump-wave absorption and the phase mismatch magnitude on the course of the process is investigated. It is shown that the absorption lead to significant changes in the process time, and the phase causes changes in dynamics but not in duration of the process.
Highlights
In recent years, in publications, much attention is paid to the possibilities of designing nanostructures with an unique electromagnetic response, which has prospects for use in various fields of both fundamental science and its various applications
The parametric interaction of three waves, one of which travel in direction opposite to other, is associated with a number of unusual phenomena that find their applications
It is shown that the absorption lead to significant changes in the process time, and the phase causes changes in dynamics but not in duration of the process
Summary
In publications, much attention is paid to the possibilities of designing nanostructures with an unique electromagnetic response, which has prospects for use in various fields of both fundamental science and its various applications. NIM, in turn, are comfort environments for the existence of backward waves, which are special waves whose phase vector direction and energy flux direction are opposite These features open up profound entirely new possibilities of linear optics, unattainable with ordinary waves. The processes of counterpropagating waves interaction themselves are characterized by anomalous efficiency which can significantly exceed the conversion efficiency in the system of interaction with copropagating waves with the same values of nonlinearity and the medium length [7,8]. Another distinctive feature here is the presence of long transient processes[9]. Some details of the medium absorption effect and phase mismatching on the transient process current are considered in more detail
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