本程序实现FDTD仿真2维TM波金属方柱散射。TM波沿Y方向传播，X方向极化。采用UPML吸收，脉冲源激励。 -This procedure realize two-dimensional TM wave FDTD simulation metal square columns scattering. TM wave propagation along the Y direction, X direction of polarization. UPML absorption using p