Why phenomenological theory cannot be used to analyze the dynamics of dark photorefractive solitons


  • Marek Wichtowski West Pomeranian University of Technology, Szczecin




The currently used theory of both bright and dark spatial photorefractive (PR) solitons is a phenomenological theory. In the work we consider the dynamics of dark beams using a microscopic model based on the PR transport equations. It is generally believed that such a theory is more accurate. It has been found that these two approaches can give completely different predictions regarding the formation time of dark beams. The discrepancies can reach up to two orders of magnitude. An approximate analytical solution was presented and a new time constant was introduced taking into account crystals from three classes of PR materials: ferroelectrics, sillenites and semiconductors.

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How to Cite

M. Wichtowski, “Why phenomenological theory cannot be used to analyze the dynamics of dark photorefractive solitons”, Photonics Lett. Pol., vol. 15, no. 4, pp. 63–65, Dec. 2023.