| 声波在双层非线性介质中传播的二极管现象 |
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| 引用本文： | 郭凤丽,胡冬生,徐江.声波在双层非线性介质中传播的二极管现象[J].计算物理,2015,32(6):722-728. |
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| 作者姓名： | 郭凤丽 胡冬生 徐江 |
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| 作者单位： | 1. 南京航空航天大学理学院, 南京 211106;2. 南京航空航天大学材料学院, 南京 211106 |
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| 基金项目： | 国家自然科学基金(11175086,51175245);江苏省自然科学基金(BK2010073)资助项目 |
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| 摘 要： | 假设声波在双层一维非线性系统中传播时线性部分满足波动方程,非线性部分类似于非线性薛定谔方程的非线性部分.对该模型正反两个方向分别入射相同的声波计算透射率发现:一定频率及强度的声波在模型中具有单向透过性,表现出声二极管的行为;随着非线性强度差异的增强,单向导通性显著提高.
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| 关 键 词： | 非线性系统 声波 整流 二极管 |
| 收稿时间： | 2014-10-20 |
| 修稿时间： | 2015-03-09 |
Diode Phenomenon of Acoustic Wave Propagation in a Two-Layer Nonlinear System |
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| GUO Fengli,HU Dongsheng,XU Jiang.Diode Phenomenon of Acoustic Wave Propagation in a Two-Layer Nonlinear System[J].Chinese Journal of Computational Physics,2015,32(6):722-728. |
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| Authors: | GUO Fengli HU Dongsheng XU Jiang |
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| Institution: | 1. College of Science, Nanjing University of Aeronautics and Astronautics, Nanjing 211106, China;2. Department of Material Science and Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 211106, China |
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| Abstract: | In one-dimensional nonlinear system, linear parts of acoustic wave meet wave equation and nonlinear part is assumed similar to that of nonlinear Schrödinger equation. Transmission coefficients of two incident acoustic waves from opposite directions are calculated respectively. It is shown that this model has unidirectional penetrability for acoustic wave within certain frequency and amplitude, and expresses behaviors of diode. Increasing nonlinear intensity leads to a remarkable enhancement of unidirectional penetrability. |
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| Keywords: | nonlinear system acoustic wave rectification diode phenomenon |
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