共查询到18条相似文献,搜索用时 62 毫秒
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对平面电磁波入射到横向分层不均匀介质上时的情形,麦克斯韦方程组可简化成马丢(Mathieu)方程和希尔(Hil)方程,据此可获得透射波和反射波场的解析表达式。从所获得的解我们得知,介质的非均匀性可改变入射波的强度分布和偏振状态,这种改变取决于多种因素,比如介质非均匀的具体形式,入射波的入射和偏振方向等;反射波的强度分布可被也可不被改变,取决于波和介质的参数 相似文献
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利用电磁场变换,讨论了运动介质中一列平面单色电磁波的能流密度给出超光速情形下电磁波及介质的性质。结果表明,随着介质运动速度的增加,电磁波能流密度方向可发生突变。 相似文献
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电磁波在多层介质内的透射 总被引:5,自引:0,他引:5
导了多层介质中透射电磁波的电场振幅与介质表面入射电磁波场电场振幅之间的关系式,引入了一个母函数,通过微分可以生成介质各层中的透射波。 相似文献
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The laws of refection and transimission on a moving interface between two nonvacuum medium are studied and the new method, which can be used for handling reflection and transimission on the moving interfaces between the vacuum-nonvacuum media and between two nonvacuum medium is suggested. The formula of reflection and transmission coefficients that suitable for both cases are derived. The present paper not only enriches electrodynamical theory, but also laies the foundation of optical waveguide modulators and other similar device. 相似文献
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The laws of refection and transimission on a moving interface between two nonvacuum medium are studied and the new method, which can be used for handling reflection and transimission on the moving interfaces between the vacuum-nonvacuum media and between two nonvacuum medium is suggested. The formula of reflection and transmission coefficients that suitable for both cases are derived. The present paper not only enriches electrodynamical theory, but also laies the foundation of optical waveguide modulators and other similar device. 相似文献
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结合运动介质本构关系,运用并矢代数方法,求解运动介质中电磁场的色散关系.结果表明,波数k与波频ω之间仍然保持线性关系,其比例系数决定于波传播方向k与介质运动方向v之间的夹角θ、参考系之间的相对运动速度口以及静止介质折射率n’的大小. 相似文献
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应用电磁场张量、电磁感应张量和它们的对偶张量讨论运动介质的电磁性质方程,指出D=εE和B=μH在运动介质中不成立,给出运动介质电磁性质方程的协变形式、向量形式. 相似文献
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J.Q. Shen 《Annalen der Physik》2010,522(7):524-531
An isotropic electromagnetic medium becomes gyrotropically anisotropic when it moves, and an anisotropic electromagnetic environment can then be created in this motion‐induced anisotropic medium. One of the most remarkable features is that the quantum vacuum in the anisotropic electromagnetic environment exhibits a nonzero electromagnetic momentum density, since the universal symmetry of the vacuum fluctuation field is broken, and the anisotropic quantum vacuum mode structure is produced because of the symmetry breaking. This would give rise to a noncompensation effect among the four vacuum eigenmodes (i.e., the forward and backward propagating modes as well as their respective mutually perpendicular polarized components), and leads to an anisotropic correction to the vacuum momentum in the moving medium. The physical significance and the potential applications of the anisotropic quantum vacuum are discussed. This quantum‐vacuum effect may be used to develop sensitive sensor techniques and to design new quantum optical and photonic devices. 相似文献
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根据经典力学、电磁学知识和经典色散理论导出了介质对高频电磁波的色散规律,由此色散规律可以清楚看出几乎所有介质对于高频电磁波来说都成为透明介质,并以金属铜为例进行了验证.据此人们可以容易地理解高频电磁波的某些应用. 相似文献