Under paraxial approximation, the transfer matrix and imaging formula of left-handed slab focusing system is derived by the law of refraction. Using ABCD law, the propagation expressions for Gaussian beam focused by a left-handed material slab are obtained.
利用折射定律获得了傍轴近似条件下左手材料平板透镜的成像公式和ABCD矩阵,然后由ABCD定律导出了高斯光束在左手材料平板透镜内部和像空间的传输公式。
参考来源 - 人工电磁材料的光学特性及应用研究·2,447,543篇论文数据，部分数据来源于NoteExpress
文中采用了傍轴近似以及绝热慢变近似。
The par-axial and adiabatic slow-varying approximation have been used.
进一步指出了高斯光束作为波动方程傍轴近似解的条件。
Furthermore, the conditions have been given that Gaussian beam is a paraxial approximation solution of the wave equation.
早期的自聚焦研究是在考虑了傍轴近似和标量场近似的前提下得到的。
The early research was based on the scalar approximation and paraxial approximation.
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