Photo-dynamics of polarization holographic recording in spirooxazine-doped polymer films

Polarization holographic gratings were recorded in 6-cyano-1,3,3-trimethylspiro[indolino-2,3-[3H]naphtha-[2,1-b][1,4]oxazine] (SO-1)-doped PMMA films. A photochemical equilibrium was observed in holographic gratings recorded by (s,s) polarized He-Ne beams with accompanying UV irradiation. For comparison, (s,p) polarization holographic recordings were also performed. The observed maximum value of the diffraction efficiency of (s,s) gratings was higher than that of (s,p) gratings. The mechanism of the photo-dynamics of the two polarization holographic recordings for SO-1 was investigated in detail.