Propagation and transformation of electromagnetic waves in one-dimensional periodic structures S Yu. Karpov ands N. stolyarov Modified coupled mode method Usp. Fiz. auk 163, 63-89(January 1993 E=「Aemx+Aem/s4o=n(x1axk0,E=√m(x,1) +2 aA +A S E E I=14 m W/cl 2×1 4x10 8×10 2x103 1×102 1×104 4×10 s 8×10 4×10 4×10 1×104 1=35u5 8×10 4002000200400-400-2000200400 (2) (2)( , ) ( , ) 1/4 / i x t i x t E A e A e    + − − = +     A S A x    =  2 2 i dn e S dx n    = Modified coupled mode method 0   = = n x t dxk n x t ( , ) , ( , ) 