中国物理B ›› 2000, Vol. 9 ›› Issue (9): 667-671.doi: 10.1088/1009-1963/9/9/006
刘劲松, 张都应, 梁昌洪
Liu Jing-song (刘劲松), Zhang Du-ying (张都应), Liang Chang-hong (梁昌洪)
摘要: We present a theoretical analysis of the stability of screening-photovoltaic (SP) spatial solitons in biased photovoltaic-photorefractive materials in the case of neglecting the loss of the material and the effect of diffusion. When an incident optical beam is a SP soliton, this beam propagates along a linear path with its shape kept unchanged. When the maximum amplitude, width and functional form of an incident optical beam are slightly different from those of a SP soliton, the beam reshapes itself and tries to evolve into a solitary wave after a short distance. That is, these SP solitons are stable against small perturbations. However, optical beams that significantly differ from SP soliton solutions tend to experience larger cycles of compression and expansion, and their maximum amplitudes oscillate with propagation distances. The larger the perturbations, the stronger the oscillation.
中图分类号: (Phase conjugation; photorefractive and Kerr effects)