极化磁化方程与负折射率材料

The polarized magnetic equation and negative refractive index materials

在新的极化磁化方程的基础上,在线性各向同性介质中,导出相对介电常数与相对磁导率之间的关系,解释极化现象和磁化现象是完全对称的,相对介电常数与相对磁导率可以同时为负,不可以一正一负.给出了介质中的洛仑兹力公式.根据能量守恒定律、介质中的洛仑兹力公式、介质极化磁化方程以及法拉第电磁感应定律,导出介质中的能流密度和介质中的能量密度.指出相对介电常数与相对磁导率同为负时,介质中能量密度仍为正.

On the basis of new polarized magnetic equation, in linear isotropic medium, the relationship between relative permittivity and relative permeability was deduced. The phenomenon of polarization and magnetization was completely symmetrical, and relative permittivity and relative permeability could be negative and could not be a positive one and a negative one were explained. The Lorentz force formula in the medium was given. According to the law of conservation of energy, the Lorentz force formula, the polarized magnetic equation and the Faraday＇s law of electromagnetic induction, energy flow density and energy density of medium were deduced. It was pointed out that the relative permittivity and relative permeability were all negative, but the energy density of medium was still positive.