The last integral over k 2 is in the form of a modified (Macdonald) Bessel function, giving the evaluated parallel component in the form: E 1 ( ω ω ) = − − i q ω ω v 2 ( 2 π π ) 1 / 2 ( 1 ε ε ( ω ω ) − − β β 2 ) K 0 ( λ λ b )