A study of the porosities of polymer nanoporous films using numerical simulations and experimental methods

摘要

In this study, the finite difference time domain (FDTD) method was used to analyze light propagation in polymer nanoporous films. Compared with some theoretical models, it is found that the composite medium in series model is consistent with the results calculated by the FDTD method. In order to verify the theoretical model, we also fabricated several polymer nanoporous films, and obtained their effective indices of refraction and porosities with an ellipsometer and scanning electronic microscope (SEM), respectively. It is indicated that the composite medium in series model is also consistent with the experimental results.