Finite-difference time-domain modeling of curved material interfaces by using boundary condition equations method
Lu Jia, Zhou Huaichun†,
       

The normalized L2 errors for plane wave incidence on the double layer dielectric cylinder (a = 5/(2π), ai = 5/(4π)). SA, BCE, and SPS are staircase approximation, boundary condition equations, and sub-pixel smoothing method, respectively. (a) TE wave illumination and (b) TM wave illumination.