Holographic recording in thin C-70-doped polymer organic films

The dynamic and static thin holographic gratings have been recorded in C-io -doped photosensitive polyimide 6B and 2-cyclooctylamino-5-nitropyridine. T he drastic change in diffraction efficiency has been observed under the Ram an-Nath diffraction condition using the second harmonic of pulse Nd laser. The threshold of the transition from phase grating to amplitude one has bee n determined. The results obtained have been explained by the absorption sp ectral peculiarities of the fullerene-doped films and by their thermal prop erties. (C) 2000 Elsevier Science B.V. All rights reserved.