On the reflectivity of one-dimensional photonic crystal realized in dichromated pullulan

In this paper we apply method of calculation of the reflectivity of one dimensional photonic crystal described in [1] but with significantly higher resolution and applied for the case of volume Bragg gratings which are made in our laboratory using dichromated pullulan. We show that calculated reflectivity as a function of incident wavelength contains rapidly oscillating part, which is not observable if the resolution of calculation is low. We show good agreement between results of the model and measured reflectivity of the 1D photonic crystal fabricated in dichromated pullulan.