Using the split-step Fourier transform method, we numerically investigate the generation of breathing solitons in the propagation and interactions of Airy–Gaussian(AiG) beams in a cubic–quintic nonlinear medium in one transverse dimension. We show that the propagation of single AiG beams can generate stable breathing solitons that do not accelerate within a certain initial power range. The propagation direction of these breathing solitons can be controlled by introducing a launch angle to the incident AiG beams. When two AiG beams accelerated in opposite directions interact with each other,different breathing solitons and soliton pairs are observed by adjusting the phase shift, the beam interval, the amplitudes,and the light field distribution of the initial AiG beams.
理论和实验研究了扩散和光伏机理下Li Nb O3晶体界面非线性表面波的传播.改变传播常数可以得到不同振荡周期的表面波模,光波的能量随传播常数的递增而单调地递增.本文的实验结果与理论分析能很好地符合.实验结果还表明,增加入射光功率可缩短表面波的产生,增大入射光束与晶体正c轴的夹角(小于90°)可提高表面波的激发效率.
