Optical constants and dielectric function of DNA's nucleotides in UV range

We calculated frequency-dependent real n(omega) and imaginary k(omega) parts of the complex refractive index n(omega) = n(omega) + ik(omega) for adenine A, guanine G, cytosine C and thymine T in ultraviolet range using Kramers-Kroning analysis of their absorption spectra. The frequency-dependent real epsilon'(omega) and imaginary epsilon(omega) parts of the dielectric function for the corresponding nucleotides were restored. We calculated also the dependence of the dielectric function on the imaginary frequency epsilon(iomega) for the corresponding nucleotides. (C) 2003 Elsevier Ltd. All rights reserved.