Abstract
Spontaneous soliton motion has been demonstrated in different systems supporting cavity solitons. Here we consider the case of a semiconductor laser with an intracavity saturable absorber, and study the interactions between self-propelled solitons when two of them collide or when they hit a localised defect in the material gain. According to the soliton velocity and impact parameter, destructive or repulsive collisions may take place between travelling solitons. On the other hand, a very rich variety of dynamical behaviors can be observed when a travelling soliton hits a material defect of comparable size. We observe soliton destruction, repulsive or attractive interaction and two trapped cases. The behavior is mainly determined by the gain contrast between the defect and the background.
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Tissoni, G., Aghdami, K.M., Brambilla, M. et al. Self–propelled soliton collisions in a semiconductor cavity soliton laser. Eur. Phys. J. Spec. Top. 203, 193–205 (2012). https://doi.org/10.1140/epjst/e2012-01543-1
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DOI: https://doi.org/10.1140/epjst/e2012-01543-1