J4 ›› 2010, Vol. 27 ›› Issue (3): 331-335.

• Nonlinear Optics • Previous Articles     Next Articles

The self-deflection of two-photon bright screening-photovoltaic spatial solitons

SU Yan-Li, JIANG Qi-Chang, JI Xuan-Mang   

  1. Department of Physics and Electronics Engineering Yuncheng University Shanxi, Yuncheng 044000, China 
  • Received:2009-07-14 Revised:2009-09-28 Published:2010-05-28 Online:2010-05-11

Abstract:

The self-deflection characteristics of bright screening-photovoltaic spatial solitons (SPSS) in biased two-photon photovoltaic photorefractive media were studied numerically. The results show that two-photon bright SPSS possesses a self-deflection process in the direction opposite to the crystal’s axis during propagation and the center of the bright solitary beam moves on a parabolic trajectory. The self-deflection distance of the bright soliton increases, reaching its maximum value at a certain external electric field, and then decreases as the external electric field increases. The relation of the self-deflection distance of bright solitons and the incidence light intensity is also nonlinear, which is similar to that of external electric field.

Key words: nonlinear optics∣two-photon photorefractive effect∣screening-photovoltaic spatial solitons∣self-deflection