The electromagnetic wave propagating through a superlattice is analyzed. The vector potential along the propagating direction obeys the sine-Gordon equation. Some soliton solutions are given for different cases.

• 在超晶格中电子的动量分布与平衡分布偏离不远的弱直流电场偏置下,分析电磁场在超晶格生长方向的传播,得到电磁场传播方向的电磁场矢势分量服从sine-Gordon方程,给出了不同条件下的几种孤子解。