THE INTERACTION OF A LASER-PULSE WITH A PERIODIC QUASI-ONE-DIMENSIONAL POLYMER

Using a perturbational-variational (Frenkel's variational principle) approach, generalized coupled Hartree-Fock equations were derived for the interaction of a gaussian laser pulse of given frequency with a periodic polymer. Applying a linear combination of atomic orbitals (LCAO) ansatz to the perturbed one-electron functions, the equations can be written in matrix form. Using the periodic symmetry of the polymer, the problem can be reduced to equations which contain only matrices of rank equal to the number of basis functions in the unit cell. We show how the solutions of these equations can be used to determine the frequency- and time-dependent polarizabilities and hyperpolarizabilities of different periodic polymers.