Dynamical behaviour of holographic gratings with a nematic film --Polymer slice sequence structure A. Marino, F. Vita, V. Tkachenko, R. Caputo, C. Umeton, A. Veltri and G. Abbate Eur. Phys. J. E, 15 1 (2004) 47-52 Published online: 14 September 2004 DOI: 10.1140/epje/i2004-10035-y