左手介质中能流传输研究  

Power Flow Propagation in the Left-handed Medium

作　　者：邓跃龙 

机构地区：[1]益阳医学高等专科学校,湖南益阳413000

出　　处：《湖南理工学院学报（自然科学版）》2010年第3期51-54,共4页Journal of Hunan Institute of Science and Technology(Natural Sciences)

基　　金：湖南省教育厅科研基金资助项目(06C225)

摘　　要：研究了平面电磁波从各向同性且均匀的非色散的右手介质(ε(ω)>0,μ(ω)>0)入射到各向同性且均匀的色散的左手介质(ε(ω)<0,μ(ω)<0)中的传播规律.为了解释色散影响,选用了两种信号光谱,分别是两个频率稍有差异的平面电磁波和高斯光束,它们分别从右手介质入射到左手介质中,在理论上求出了在左手介质中场和坡印亭矢量的表达式,并计算了玻印亭矢量对时间的平均值,从能流流向的角度证明了波从右手介质入射到左手介质中发生负折射.The transmission at a boundary between a right-handed medium （e（m）〉 0,μ（m）〉 0）and a frequency dispersive left-handed medium （e（ω）〈 0,μ（m）〈 0）, both homogeneous and isotropic are expounded. In order to express the influence of dispersion, chooses two kinds of signal spectrum, which are plane electromagnetic waves and Gaussian beam that exist little difference in frequency, they incident from right-handed medium to left-handed medium respectively and offers explicit expression for the field and Poynting vectors theoretically, and calculate the time-domain fields and time-averaged Poynting vector. From the direction of power flow vector it is proved that waves will exist negative refraction at a RHM-LHM interface.

关 键 词：右手介质 左手介质 坡印亭矢量 

分 类 号：O441.4[理学—电磁学]