The transport of dipole solitons in a one-dimensional nonlinear photonic crystal

Abstract

Quadratic χ(2) nonlinearity crystal provide an ideal stage for the researches of the transport of optical solitons. However, the transport of dipole solitons in a homogeneous χ(2) nonlinear medium is unstable. To solve this problem, a one dimensional nonlinearity photonic crystal is designed from a χ(2) nonlinearity crystal by quasi-phase matching technique. The duty cycle of the positive polarized in the transverse direction of the crystal is periodic modulated, so as to realize a stable transport of dipole solitons in it. Besides, relations of the transportation characteristics of the dipole soliton and the modulation parameters are researched in this letter numerically. Moreover, mobility and collision of these dipole soliton through the crystals are discussed through the paper. Some key parameters of the related experiment are also estimated.