E Ez Er H H I H I + I i+2 Figure 3. 1 Inter leaving of the E and H fields for the two-dimensional TM formulation D2(,)=D2(,)+05(H(+1/2,n-H(-1/2 05(H(+1/2)H"(-1/2) H(,)=H(0)-05(E2(n+1)-E(2/) 2021/12/10 H“(,)=H”()+05(E(+1)-E"2(,)2021/12/10 4 ( ) ( ) ( ( ) ( )) ( ( ) ( )) 1/2 1/2 , , 0.5 1/ 2, 1/ 2, 0.5 , 1/ 2 , 1/ 2 n n n n z z y y n n x x i j i j i j i j i j i j + − = + + − − − + − − D D H H H H ( ) ( ) ( ( ) ( )) 1 1/2 1/2 , , 0.5 , 1 , n n n n x x z z i j i j i j i j + + + H H E E = − + − ( ) ( ) ( ( ) ( )) 1 1/2 1/2 , , 0.5 1, , n n n n y y z z i j i j i j i j + + + H H E E = + + −