负折射率介质层中光波的相位和传输特性研究

针对在理解负折射率材料中光波的传播特性时相位的特殊性质 ,详细分析推证了负折射率介质中折射率、波矢k的大小和方向、空间坐标系以及波相相位互之间的关系。分析结果表明负折射率介质层中的波矢k的反常取向是由于其标量值为负 ;在统一的坐标系下 ,由该标量值参与数值计算和分析 ,k则由标量值和单位矢量k0 (k0 >0 )共同决定 ,而不必再考虑左、右手系的区别。在此基础上依据电磁场理论推导了光波在负折射率介质层中的传输矩阵 ,用以分析含有负折射率介质层的复杂薄膜系统的光学性质。初步计算结果显示含有负折射率介质层的膜系对TE和TM波的光谱特性都有显著改变

Analysis of Phase and Transfer Properties of Optical Waves in Negative Refractive Index Medium Layers

For understanding the phase and transfer properties of optical wave propagating through negative refractive index medium (NIM) layer, the relations between negative refractive index, the value and direction of wave vector k, the coordinates and the phase have been investigated intensively. The results prove the peculiar direction of the wave vector k in a NIM layer results from its negative scalar magnitude. In the identical right hand coordinate system within NIM and PIM layers, only this negative scalar needs to substitute in the numerical simulation, while the vector k should be determined by both the negative scalar and the unit vector k 0(k 0>0). Based on this analysis, a transfer matrix of optical waves in NIM layer has been derived. The primary results show that the spectra characteristics of TE and TM modes from the films comprising NIM and PIM layers have changed prominently.