Electric and Magnetic Field Effect Studies on the Hologram Recording in Azobenzene Molecular Films

摘要

Various electrooptic and magnetooptic effects enable the electric and magnetic field control of the holographic information recording. They can become significant if the frequency of light irradiation is close enough to the absorption line of a material. In this paper, these effects are theoretically considered, and the influence of applied external electric (up to 17 kV/cm), as well as magnetic (0.15 T) field on the transmission holographic grating recording in azobenzene-based molecular films at 632.8 and 532 nm is experimentally studied. Recording beam polarizations were s-s, p-p, L-L and L-R. Self-diffraction efficiency (SDE) exposure time dependences were measured with and without the applied fields, and maximum SDE values, as well as recording energies corresponding to 0.017% SDE were determined. No effect of electric field was found within the measurement accuracy (15 %). Some trend to recording efficiency increase by magnetic field was observed. This observation is in the agreement with the theoretical analysis. Unfortunately, these results are within experimental errors of 15-24 %.