| 反铁磁晶体中的非线性TE表面波 |
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| 引用本文： | 王奇,王又发,鲍家善.反铁磁晶体中的非线性TE表面波[J].物理学报,1997,46(1):145-154. |
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| 作者姓名： | 王奇 王又发 鲍家善 |
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| 作者单位： | 上海大学物理系 |
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| 摘 要： | 将反铁磁晶体中ＴＥ表面波满足的非线性波动方程变形为伯努利微分方程，用反函数形式给出了表面波磁场的精确解．证明非线性ＴＥ表面波存在的必要条件是μx＞０．求得了色散方程，分析了非线性ＴＥ波的频率范围．理论结果表明，导波磁场峰值位置具有稳定性，同功率无关；在ε1＞ε2条件下，在功率阈值之上，一个传播功率对应两个不同的有效折射率，表面导波具有双稳特性
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| 关 键 词： | 反铁磁晶体 非线性波动 表面波 |
| 收稿时间： | 1995-10-12 |
NONLINEAR TE SURFACE WAVES ON AN ANTI FERROMAGNET |
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| WANG QI,WANG YOU-FA and BAO JIA-SHA.NONLINEAR TE SURFACE WAVES ON AN ANTI FERROMAGNET[J].Acta Physica Sinica,1997,46(1):145-154. |
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| Authors: | WANG QI WANG YOU-FA and BAO JIA-SHA |
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| Abstract: | The nonlinear characteristics of TE surface wave on an anti-ferromagnet is studied.The nonlinear motion equation for TE wave is converted to Bernoulli differential equation and its exact solution is found in a form of inverse function.The necessary condition for the existence of nonlinear TE surface wave is μx>0.The dispersion equation and the frequency region are analyzed.The theoretical results show that the peak position of the magnetic field is not a function-of power and localized steadily at the surface of the material.In the condition of-- ε1>ε2 one guiding power corresponds two different effective refraction indexes showing the bistable property of the nonlinear TE surface waves. |
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