Nanjing University Basic Principle Commonly,magnetic response is neglected for the optical material u=1 Electric part can be described by D(r,t)=8o[dt'dr's(r-r',t-1)E(r',t) J(r,t)=[dt'dr'a(r-r',t-t')E(r',t') Taking Fourier Transformation D(K,0)=6(K,o)E(K,o) J(K,0)=σ(K,⊙)E(K,o) Fourier domain of k-@space Dielectrie Superlattice Laboratory Nat.Lab.Microstructures Dr.Tao Li taoli@nju.edu.cnNanjing University Commonly, magnetic response is neglected for the optical material μ = 1 Electric part can be described by 0 ( , ) ' ( , ') ( , ') ( ) ' ( ') ( ') t dt d t t t d d = −− ε ε ∫ ∫ D r r' r r' E r' J ' ' E' ( , t) '( = dt d σ − − , tt t ') ( , ') ∫ J r r' r r' E r' Taking Fourier Transformation 0 ( , ) ( , )( , ) ( ) ( )( ) ω εε ω ω ωσ ω ω = = DK K EK JK K EK JK K EK ( ,ωσ ω ω ) ( = , ) ( , ) Fourier domain of k-ω space Dielectric Superlattice Laboratory Nat. Lab. Microstructures Dr. Tao Li taoli@nju.edu.cn Fourier domain of k-ω space