Spatial and temporal characteristics of electrically fixed holograms in photorefractive strontium-barium niobate
We report measurements of the holographic diffraction efficiency (HDE) of single photorefractive gratings fixed by an externally applied voltage pulse in Sr0.75Ba0.25Nb2O6. The polarization grating HDE and decay rate are strongly dependent on the grating spacing and also depend on the intensity of the light beams during the recording and erasing/reconstruction process. Knowledge of the dependence of the fixing process on spatial frequency may be useful for the creation of physical models of local polarization switching in ferroelectrics.
Copyright © 1994 American Institute of Physics. (Received 18 October 1993; accepted 9 December 1993) This work was supported by the Advanced Research Project Agency and the U. S. Air Force Office of Scientific Research. We thank Yang Qiao, Jiafu Luo, and Whye-Kei Lye for their help.