Far-off-Bragg reconstruction of volume holographic gratings: A comparison of experiment and theories

摘要

We performed light optical diffraction experiments on a nanoparticle-polymer volume holographic grating innan angular range including far-off-Bragg replay. A comparison of three diffraction theories, on the same levelnof complexity, with our experimental results shows that the dynamical theory of diffraction and the first-orderntwo-wave coupling theory using the beta-value method fit the data very well. In contrast, the prevalent two-wavencoupling theory using the K-vector closure method yields a poor fit with an order of magnitude worse meannsquared error. These findings must be considered for accurate determination of coupling strength and gratingnthickness.