Grating inscription in DR1:DNA-CTMA thin films: theory and experiment

摘要

Recent experimental results indicate that the inscription of gratings in DR1:DNA-CTMA thin films displays some features of non-exponential grating amplitude growth with time. The origin of this behavior is hypothet-ically assigned to a complex distribution of local voids in a polymeric matrix which strongly influences the dynamics of grating inscription modelled using the semi-intercalation hypothesis. We discuss critically those topics, review the theoretical methods used for modelling of the grating inscription and point-out a hypothetical relation to complex systems. New experimental results of holographic DTWM recording of the gratings in DNA-CTMA:DR1 and PS:DR1 are presented. The two observed types of dynamics are hypothetically assigned to various distributions of local voids in corresponding polymeric matrices.