KINETICS OF DIFFRACTION GRATINGS IN A POLYMER MATRIX CONTAINING AZOBENZENE CHROMOPHORES: EXPERIMENT AND MONTE CARLO SIMULATIONS

摘要

We propose a simple kinetic model of diffraction gratings recording in a polymer matrix doped with azobenzene chromophores under the illumination with spatially modulated and linearly polarized light. The model, based on a polymer matrix controlled two-state, three-channel kinetics of trans-cis type photoisornerization cycles, is studied using kinetic Monte Carlo simulations on a lattice. Semi-quantitative agreement between experimental data (two-wave mixing method) for diffraction efficiency and the modeling is found. Fast and slow cis-particle kinetic processes responsible for experimentally observed two-exponential functional dependence of diffraction efficiency as function of time are identified.