A steady-state heat conduction solution for optical disk recording using constant or periodically modulated laser irradiation

An efficient method for computing the steady-state temperature in multilayer thin-films heated by periodically modulated laser irradiation has been presented. The method is based on the Fourier-transformed Green's function solution, which accepts laser intensities of arbitrary time dependence but of finite duration. The steady-state solution takes advantage of the simple representation of periodic signals in the frequency domain to calculate just the steady-state temperature in less time and with less memory. The new solution is essentially the previous Green's function solution plus a specially defined lattice.