A new FDTD method for N-th order Lorentz dispersive media

作者：Yang, Hong Wei^*

来源：Optik, 2013, 124(12): 1199-1201.

DOI：10.1016/j.ijleo.2012.03.009

• FDTD method
• Dispersive media
• Shift operator

A method for applying the finite-difference time domain (FDTD) method to dispersive media with complex permittivity described by function with a single first-order pole was presented. This method involved the recursive evaluation of a discrete convolution, and was therefore relatively efficient. In this paper, a shift operator approach is extended to media with dispersions described by multiple second-order poles. The significant change from the first-order implementation is that the formulation is simple. The approach is demonstrated for a pulsed plane wave incident on a medium with a complex permittivity described by two second-order poles, and excellent agreement is obtained with the exact solution.

• 出版日期2013
• 单位南京农业大学